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3 years ago

Help idk how to do it

Mathematics

2 answers:

Sonja [21]3 years ago

8 0

Answer:

The measure of angle b is 15 degrees,

Step-by-step explanation:

Both triangles are isosceles. The inside one is also a right triangle. Since the big triangle is isosceles and the two angles add up to 120 degrees, they also have to be equal, meaning ∠P≅∠R=60 degrees. The inside triangle is also isosceles, meaning that m∠a=60°-b, which 60°-b representing the measure of the last angle in the smaller triangle. Since ∠a and the third angle are congruent, they each have to equal 45°. 60°-45°=15°. The measure of ∠b=15°.

malfutka [58]3 years ago

6 0

Answer:

b=15

Step-by-step explanation:

360-90=270

270+60=330

360-330=30/2=15

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