S3 Credit Mathematics Similar Triangles

There now follows a short test.

1. Which of the following is similar to the above triangle? B. A. C.

2. Give the reason why the following triangles are similar? A.2 sides proportional and included angle B.3 sides proportional C.Equiangular

3.Are the following triangles similar? A B C L 4 N M A.Yes B.No

4.Are the following triangles similar? A.Yes B.No A B C 47º L N M

5.Are the following triangles similar? A.Yes B.No A B C 46º 8 7 P R Q 3.5 4

6.Are the following triangles similar? If they are similar, give reasons. A 51º D B E C

35º 7.Are the following triangles similar? Give reasons.

8. In the figure, the two triangles are similar. Calculate x and y. P B A C Q R 3 x y

9.In the figure, the two triangles are similar. Calculate m and n. A B C P Q R m n

10.In the figure, the two triangles are similar. Find x, y and z. A B C 3 y z P Q R 9 12 x

End of Test

Answers 1.B 2.C 3.B 4.A 5.B 6.Yes, equiangular 7.Yes, equiangular 8.x = 4, y = m = 22.5, n = x = 15, y = 4, z = 5