21 is the right answer.
180-138=42°
and since it is given in the question that the triangle is isoceles ,so half of 42 is 21°
Answer:
What is the question?
You just gave a statement.
Step-by-step explanation:
Answer:
(2,1) ==> (-2,-1)
(-1,-1) ==> (1,1)
(-2,3) ==> (2,-3)
(-3,3) ==> (3,-3)
Step-by-step explanation:
The picture in the attached figure
let
AB=x
we know that
perimeter of the figure=10*x
perimeter=42.5 cm
so
42.5=10*x
x=42.5/10
x=4.25 cm
area of the figure=area of rectangle +area of square
area of rectangle=4.25*(4.25*3)----> 54.1875 cm²
area of square=4.25²----> 18.0625 cm²
area of the figure=54.1875+18.0625-----> 72.25 cm²
the answer is72.25 cm²