Mathematics
Grade9
Easy

Question

For what values of  x is  a rectangle?

  1. 10
  2. 8
  3. 2.5
  4. 5

hintHint:

each interior angle of a rectangle is = 90 to the power of o

The correct answer is: 10


    option 1: 10 is the correct answer
    All the angles of a rectangle are 90°.
    S o comma space 40 degree space plus space 5 x space equals space 90 degree
space space 5 x space equals space 50 degree space
x space equals space fraction numerator space 50 degree space over denominator 5 end fraction
space x space equals space 10 to the power of o