4.2.5 Isosceles and Equilateral Triangles - Worksheet
Example 1: 1. To find the distance QR across a river, a surveyor locates three points Q , R , and S . QS = 41 m, and m ∠ S = 35°. The measure of exterior ∠ PQS = 70°. Draw a diagram and explain how you can find QR.
Example 2: Find each angle measure. 2. m ∠ ECD E D C
3. m ∠ K J
K
L 82°
31°
A
B
4. m ∠ X
5. m ∠ A
A
4 x °
2 x °
C
B
Example 3: Find each value. 6. y
7. x
R
S
M
12 y °
(10 x + 20)°
L
T
N
244
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