Question

What is the measure of angle c? (Brainliest and Bonus points for best answer)

Answer 1

Answer:

$\displaystyle 65°$

Step-by-step explanation:

Angle b and 135° form a linear pair, so when summing them up to 180°, you will have 45° left over:

$\displaystyle 180° = 135° + m∠b; 45° = m∠b$

Now, by the Vertical Angles Theorem, angle a and 70°, in this case, are to be in congruence with each other, so you have that.

Now you must find the the measure of angle c sinse you have already found the measure of two angles already:

$\displaystyle 180° = 45° + m∠c + 70° → 180° = 115° + m∠c; 65° = m∠c$

I am joyous to assist you at any time.

Answer 2

Hey there!

The answer to your question is 65°.

To solve for m∠c, we first need to solve for m∠a and m∠b.

First, we will solve for m∠b:

We can see that ∠b is right next to the angle that measures 135°. Those two angles are supplementary angles, and form a linear pair. Therefore, their angle sum is 180°. (This is the linear pair postulate) So we can set up the following equation:

$180=135+b$

$45=b$

Therefore, m∠b = 45.

Now, we have to solve for m∠a. Using the vertical angles theorem, we know that if two lines intersect, the angles vertical of eachother are always equal. ∠a and the angle that measures 70° are vertical angles, and congruent. So:

$a=70$

Therefore, m∠a = 70°.

We also know that the angles inside of a triangle always add up to 180°. That means that $b+a+c=180$. So we can set up the following equation:

$45+70+c=180\\115+c=180\\c=65$

Therefore, m∠c = 65°.

Have a terrificly amazing day!