Mathematics
Grade9
Easy

Question

Find the measure of the unknown angle.

  1. 90°
  2. 53°
  3. 64°
  4. 71°

hintHint:

W e space k n o w space t h a t space t h e space s u m space o f space e x t e r i o r space a n g l e s space o f space a space p o l y g o n space i s space 360 space d e g r e e s. space

The correct answer is: 53°


    o p t i o n space left parenthesis 2 right parenthesis space 53 to the power of o space i s space t h e space c o r r e c t space a n s w e r
W e space k n o w space t h a t space t h e space s u m space o f space e x t e r i o r space a n g l e s space o f space a space p o l y g o n space i s space 360 space d e g r e e s. space
space S o comma space 56 degree space plus space 72 degree space plus space 91 degree space plus space x degree space plus space 88 degree space space equals space 360 degree
space space space space x space equals space 53 degree

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