Ms. Terkper's Digital Classroom

Welcome to Math 9 Unit 4: Similar Triangles and Applications

1. Determine the length of AB in the pair of similar triangles.

Image of two triangles for question 1

2. Jaquie is 1.6 m tall. When her shadow is 2.0 m long, the shadow of the school’s flagpole is 16 m long. How tall is the flagpole? Give your answer to the nearest tenth of a meter.

Shadow problem with Jaquie and the flagpole

3. Phillipe places a mirror on the ground 6.0 m from a tree. When he is 1.7 m from the mirror, he can see the top of the tree. His eyes are 1.5 m above the ground. How tall is the tree to the nearest tenth of a meter?

Mirror problem with tree height

4. Determine the distance PQ across the river based on Emil's measurements.

River crossing diagram for Emil

5. Tina’s shadow is 2.4 m and the first tree’s shadow is 10.8 m. Tina is 1.7 m tall. What is the height of the tree?

Tina and tree shadow problem

6. This scale diagram shows the measurements a surveyor made to determine the length of Lac Lalune. What is this length?

Lac Lalune problem diagram