Question

Provide the missing reasons in the proof.

Choices for the above proof:
Angle Addition Postulate
ASA Congruence Postulate
Given
Definition of right triangle
∆ is a right triangle
51° + 39° = ∠;
90° = ∠;
∠ is a right angle
Definition of right angle
Angle Congruence Postulate

Answer 1

The angle ∠DEF is equal to 90 degrees. Then the triangle ΔDEF will be a right-angle triangle.

What is a right-angle triangle?

It's a form of a triangle with one 90-degree angle that follows Pythagoras' theorem and can be solved using the trigonometry function. The Pythagoras theorem states that the sum of two squares equals the squared of the longest side.

The angle ∠DEG = 51° and angle ∠GEF = 39°.

Then prove that the triangle ΔDEF will be a right-angle triangle. Then we have

We know that if one angle of the triangle is 90 degrees then the triangle will be named a right-angle triangle.

The sum of the angle ∠DEG and ∠GEF will be

∠DEF = ∠DEG + ∠GEF

∠DEF = 51° + 39°

∠DEF = 90°

Then the triangle ΔDEF will be a right-angle triangle.

More about the right-angle triangle link is given below.

https://brainly.com/question/3770177

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