Grade 8 · Geometry
This quiz helps revise “Similar triangles” in Geometry for grade 8. It has 25 questions in five categories: Similarity tests, Side proportions, Angles and matching, Parallel segment, Scale and area. Questions get harder as the points go up, from 100 to 500.
The 100- and 200-point questions are open here. The rest show only their first words, and there are no answers: all of that is in the game itself.
Two triangles have two pairs of equal corresponding angles. Which test proves they are similar?
Two triangles have side lengths 3, 4, 5 and 6, 8, 10. Which test proves they are similar?
Around equal 55° angles…
In the gameAll three corresponding angles…
In the gameTwo truss sections have…
In the gameThe larger of two similar triangles has scale factor 2. A side of the smaller is 4 cm. What is the matching larger side?
For similar triangles, AB:DE = 3:7 and AB = 6 cm. Find DE.
The smaller triangle has…
In the gameA larger triangular kite…
In the gameFor similar triangles, AB:DE…
In the gameA triangle similar to another has two angles of 45° and 55°. Find its third angle.
Triangles ABC and DEF are similar, with A matching D and B matching E. If A = 50° and B = 70°, find F.
Triangles ABC and DEF…
In the gameTriangles ABC and DEF…
In the gameIn a triangle, angle…
In the gameIn triangle ABC, D lies on AB, E lies on AC, and DE ∥ BC. Which two triangles are similar?
In triangle ABC, DE ∥ BC. If AD = 2 cm, DB = 3 cm, and AE = 6 cm, find EC.
In a triangular roof…
In the gameIn triangle ABC, DE…
In the gameIn triangle ABC, DE…
In the gameA larger triangular model has scale factor 3 from a smaller one. The smaller perimeter is 12 cm. What is the larger perimeter?
The corresponding side ratio of two similar triangles, small:large, is 2:3. What is their area ratio?
A triangular garden bed…
In the gameThe areas of two…
In the gameSimilar triangles have perimeters…
In the gameAll 25 questions and the answers are in the game. Invite your class or friends with a link — guests need no account.