PLS HELP WITH THESE TWO QUESTION PLS PLS PLS

C (180 = 80 + 45 + x)

Step-by-step explanation:

When you subtract 80 and 45 from both sides, you would result in x. 180 is the sum of all triangle's interior angles.

21

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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