Question

33.
Find the area of the square ABCD?
All
(A) 160 m2
(B) 140 m2
(C) 125 m2
(D) 120 m2​

Answer 1

Answer:

I think it is D ..................

Answer 2

Answer:

A 160 sqm

Step-by-step explanation:

I am not solving this problem. but giving a hint towards solution

√6^2+8^2=10

one diagonal will make an isosceles ∆ with two 10 m sides

angle between 10 meter side is 90°+A (let)

we need to evaluate cosine of this angle

cos(90+A) = -sinA = -6/10 = -3/5

now, recall a formula

c^2 = a^2+b^2-2abcosA

calculate c, this is length of diagonal

take half of it

diagonals of square are perpendicular bisectors

use pythagorus to determine side of a square

find the area.

hope you will solve it