Question

Sarla made a drawing of a geometric figure for a fabric print. The figure was a quadrilateral with a pair of angles measuring 40° each. If the figure she drew is a concave polygon, which of these could be the measures of the other two angles?
Answer

130°, 150°

160°, 140°

200°, 80°

220°, 110°

Answer 1

help @genius12 ?

Answer 2

@drawar ?

Answer 3

What is the definition of a concave polygon?

Answer 4

Sum of angles in quadrilateral = 360. So far we have 80. 360 - 80 = 280 left. One of the angles must be greater than 180 to be concave.

Answer 5

so 200 and 80 should be the answer @hea ?

Answer 6

yep

Answer 7

thanks guys I have one more @hea @vikrantg4 @drawar

Answer 8

Which statement about the figure is not correct?

It is an irregular polygon.

It is a convex polygon.

It has four interior angles.

It is a quadrilateral.

Answer 9

As we know from the previous question a concave polygon is defined by having one interior angle greater than (or equal to) 180 degrees

Answer 10

(convex is the opposite of concave)

Answer 11

so choice C is out

Answer 12

its B ?

Answer 13

yep

Answer 14

thank you !