The sum of the measures of the angles of a triangle is 180 degrees.
An isosceles triangle has two congruent sides.
The angles opposite the congruent sides are congruent.
Just like the bottom left angle measures x, the bottom right angle also measures x.
x + x + 38 = 180
2x + 38 = 180
2x = 142
x = 71
ANSWER

EXPLANATION
It was given that, the length of the rectangular building is

and the width of the is

The area of a rectangular building is calculated using the formula for finding the area of a rectangle.

Since the dimensions are given in terms of x, the area is also a function of x,

We expand to get,



meters square
Yes, i believe so because u can count back twice and u will get 5. You could al so do: 7-2=5. Hope this helps