Mathematics
Grade9
Easy
Question
What is the value of ‘r’ in the rotation of the triangle about A?
- 3
- 4
- 5
- 6
Hint:
compare corresponding sides and put given values and get the unknown values.
The correct answer is: 5
Step 1 : Rotation is isometry.
r = 5
3s = r + 7 (substitute r = 5)
Step 2 : solving for s
3s = 5 + 7
3s= 12
s = 4.
corresponding sides are equal compare / equate them .
