Question

Three copies of a triangle were rotated and positioned as shown.

Which statement is always true about the angles in the figure?



A.
Angle a and angle b form a right angle.

B.
Angle a, angle b, and angle c form a straight angle.

C.
Angle a, angle b, and angle c form an acute angle.

D.
Angle a and angle c form a right angle.
http://static.k12.com/calms_media/media/1560500_1561000/1560886/1/9802ac7ff988edb935d91b3cca776050aab31677/MS_IMC-1401112-109063.jpg


I think A?

Answer 1

@iGreen

Answer 2

Well which one makes the least sense here? Think about what the angles mean, what is a right angle? Straight angle? Acute angle?

Answer 3

Lets eliminate them one by one, so can angle a and angle b form a right triangle?

Answer 4

straight angle = 180*
acute angle = 89*-1*
right angle = 90*

Answer 5

its D right 45+45=90

Answer 6

@Astrophysics

Answer 7

Focus on angle a, b, c what does it tell us?

Answer 8

there all 45* and if you do 45*+45*= 90* so A=45 and C=45 so A+C= a right angle so then it makes it D right @Astrophysics