Mathematics
Grade9
Easy
Question
The quadrilateral is rotated about O. What is the value of y?
- 2
- 3
- 4
- 5
Hint:
compare corresponding parts of quadrilaterals.
The correct answer is: 3
Rotation is isometry.
Step 1 :
Comparing corresponding parts
2y = 6
y = 3
3, is the value of y.
5x = 3y + 1 (substitute y = 3)
5x = 3(3) + 1
5x = 10
x = 2
corresponding parts of quadrilaterals, remain same after rotation.
