Question

Question 10

QRST is a parallelogram. Find a.
parallelogram QRST with side QT measuring 3 a plus 7 and RS measuring 4 a

15

12

7

9

Answer 1

7

Explanation

The opposite sides of a parallelogram are equal and parallel.

∴ 3a + 7 = 4a

3a - 4a = -7

-a = -7

-a = -7

Divide by -1 both sides of the equation,

a = 7

Answer 2

Explanation:

we know, For a parallelogram-

opposite sides are equal.

So, in QRST , we get

RS=QT

Using the values we get

4a=3a+7

subtracting 3a

4a-3a=3a+7-3a

or, a=7

Ans. a=7