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Geometry A

4.9 (36 ratings)
Taken by 215 students

When it’s time to master geometry, Juni can help your students grow in skill and confidence. This is a proof-based, high school level geometry course teaching concepts like lines and angles, triangles, triangle dissection, proof-based problems, and trigonometry.

Private 1:1
Age 13-16
50 minutes
Per class
Geometry A

About this Course

This Juni Math Course is common core aligned and is perfect for learners looking to catch up or get ahead. Each lesson is designed around exciting projects and discovery-based learning, giving students a fun and practical way to hone their math skills.

Billed as

$275 / month

4 classes / month × $68.75 / class
  • Cancel anytime

1:1 classes are 50 minutes long and can be scheduled anytime Monday-Sunday from 7am to 7pm PT. To begin, select Book your Placement Class to signup. Our team will then match you and set up your first class!

  • Course duration
    4-6 months
  • Lesson
    50 minutes
  1. Definitions and Notations-1: The student understands what congruence is.

  2. Definitions and Notations-2: The student can identify: points, lines, rays, line segments, midpoints, angle bisectors, and adjacent angles.

  3. Definitions and Notations-3: The student can identify angle sizes (acute, right, obtuse, straight).

  4. Definitions and Notations-4: The student can find the degree of unknown angles given they are complements to a known angle.

  5. Definitions and Notations-5: The student can find the degree of unknown angles given they are supplements to a known angle.

  1. Logical Reasoning-1: The student can identify the hypothesis and conclusion of a conditional statement.

  2. Logical Reasoning-2: The student can name the converse, inverse, and contrapositive based on a given conditional.

  3. Logical Reasoning-3: The student can produce a counterexample for a given conjecture.

  4. Logical Reasoning-4: The student can define a biconditional statement and why biconditionals are useful.

  5. Logical Reasoning-5: The student can use the Law of Detachment.

  6. Logical Reasoning-6: The student can use the Law of Syllogism.

  1. Proofs-1: The student can use the SAP and midpoint theorems.

  2. Proofs-2: The student can use AAP and angle bisector theorems.

  3. Proofs-3: The student can write a simple, two-column geometry proof.

  1. Lines, Angles, and Coordinates-1: The student can identify parallel lines, perpendicular lines, alternate interior angles, same-side interior angles, alternate exterior angles, corresponding angles, and vertical angles.

  2. Lines, Angles, and Coordinates-2: The student can prove lines are parallel and perpendicular.

  3. Lines, Angles, and Coordinates-3: The student can use the distance formula to find the distance between two points.

  1. Classifying Triangles-1: The student knows the different classifications.

  2. Classifying Triangles-2: The student understands triangle inequality.

  3. Classifying Triangles-3: The student can calculate area and perimeter of a triangle.

  1. Triangle Congruence-1: The student can recognize SSS congruence.

  2. Triangle Congruence-2: The student can recognize SAS congruence.

  3. Triangle Congruence-3: The student can recognize ASA congruence.

  4. Triangle Congruence-4: The student can recognize AAS congruence.

  5. Triangle Congruence-5: The student can recognize HL congruence.

  6. Triangle Congruence-6: The student can prove two triangles are congruent.

  1. Triangle Similarity-1: The student knows what similarity is.

  2. Triangle Similarity-2: The student knows what scale factor is.

  3. Triangle Similarity-3: The student can recognize SSS similarity.

  4. Triangle Similarity-4: The student can recognize SAS similarity.

  5. Triangle Similarity-5: The student can recognize AA similarity.

  6. Triangle Similarity-6: The student can prove two triangles are similar.

  1. Right Triangles-1: The student understands and can prove the Pythagorean Theorem.

  2. Right Triangles-2: The student can identify common Pythagorean triples.

  3. Right Triangles-3: The student can use the properties of a 45-45-90 triangle.

  4. Right Triangles-4: The student can use the properties of a 30-60-90 triangle.

  1. Bisectors-1: The student knows the different types of bisectors.

  2. Bisectors-2: The student knows the definitions of circumscribe and inscribe.

  3. Bisectors-3: The student can distinguish between the incenter and the circumcenter.

  4. Bisectors-4: The student understands how the properties of the incircle are related to the perimeter and area of the triangle which inscribes it.

  5. Bisectors-5: The student understands how to use the angle bisector theorem.

  1. Medians and Altitudes-1: The student knows what a median and the centroid are.

  2. Medians and Altitudes-2: The student knows the triangles formed by the medians are each have the same area.

  3. Medians and Altitudes-3: The student knows what the orthocenter is.

  4. Medians and Altitudes-4: The student understands the relationship between the orthocenter and the type of triangle.

  1. Inequalities with Triangles-1: The student can identify the largest and smallest sides in a triangle based on the measures of the angles.

  2. Inequalities with Triangles-2: The student can determine type of triangle using Pythagorean inequality.

  1. Basic Trigonometry-1: The student can calculate the sine, cosine, and tangent.

  2. Basic Trigonometry-2: The student understands how the sides right triangles with vertices on the unit circle relate to sine and cosine.

  3. Basic Trigonometry-3: The student can determine the sign of sine and cosine by what quadrant the triangle is in.

  1. I can explain what the question is asking for.

  2. I can explain my thinking behind my work.

  3. I check my work carefully during or after I finish a question.

  4. When I am stuck on a question, I show perseverance by trying a new method or asking for help.

  5. When I am stuck on a question, I use what I know to find a place to start.

  1. Joyful Collaboration

    1. I practice listening to my instructor and sharing my ideas to co-create understanding.
    2. I attempt tasks independently and ask my instructor questions when I need help.
  2. Unlimited Curiosity

    1. I take ownership of my learning by asking meaningful questions both when I need clarification and when I want to know more about a topic.
  3. Nimble Determination

    1. I practice resilience when I am frustrated that I have not yet achieved mastery of a new concept or skill; instead of complaining about challenges, I try new approaches and creative solutions.
  4. Investment in Excellence

    1. I arrive to class on time and prepared to learn, with my computer set up with a strong internet connection.
    2. I complete my homework on time, and if I cannot complete my homework due to other obligations, I honestly communicate the reasons for late homework to my instructor.
    3. I do my best to stay present and on task for the whole session. I support my focus by putting away any distracting technology and setting notifications on my device to “do not disturb” mode.

Instructors will assign students roughly 60 minutes of class related problems at the end of each session. Homework is generally pulled from Juni's curriculum and is meant to complement the class experience and ensure the student continues to learn and grow outside of the session

Completion of Algebra 1

Who are Juni’s Instructors?

Our instructors are subject matter experts from top US universities. Instructors are highly-vetted and background checked prior to joining and undergo extensive training before ever teaching on our platform.

Upon signing up, parents are asked a series of questions that allow us to match your child with an optimal instructor based on their unique needs and interests. Factors that are considered in our matching process include Learning Style, Personality, Personal Experience, and Academic & Career Aspiration.

Headshot for Puja D
Puja D
I really like bringing a strong energy to my classes, and sharing excitement with my students about learning new topics.

Real Reviews from Real Parents

4.9 out of 5



My 3 sons ages, 10 1/2, 9 and 7 started using Juni in early June 2020 and absolutely love it. The instructors are college age kids and they relate to my boys very well. My oldest is doing both the coding and math tracks and I feel like he will be way ahead of his 5th grade class come the fall. Once the other two are old enough I will certainly be enrolling them in math as well.

Tarun Mehta

Juni has been amazing for my daughter. She is a reluctant learner when it comes to Computer Languages, but the Juni instructors have been engaging to her at a level where she feels comfortable with them and they manner in which they present the curriculum. They understood my ask that I Wanted her to start liking computer languages, and they are presenting the information in a way that is fun and relatable. I am very happy with my Juni experience and my daughter's journey with Juni so far!


I have two boys taking classes and the Juni takes the time to match the right instructor for my children. They are patient and very consistent in their teaching. The boys are thoroughly enjoying their class and love accomplishing and learning new things!

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