In △XYZ, XY=XZ.

Find the length of XY of △XYZ if XY=2a, YZ=3a+1, and XZ=5a-12.

4

6.5

8

29

*Q2:

In △ABC, m∠A = (4x+7) ° and m∠B = (5x-3) °.

What is m∠B?

Question 2 options:

47°

10°

45°

93°

1. In △XYZ, XY=XZ.

We have to Find the length of XY of △XYZ if XY=2a, YZ=3a+1, and XZ=5a-12.

Now, X Y=X Z [given]

→2 a = 5 a-12

Bringing like terms on same side

→2 a-5 a=-12

→-3 a=-12

→a = (-12) : (-3)

a=4 is correct answer among all the options.

2. In △ABC, m∠A = (4x+7) ° and m∠B = (5x-3) °.

What is m∠B?

Ans: as ∠ C not given we can't find ∠B.