Which angle’s measure is equal to the sum of the meaures of ∠bac and ∠bca? ∠cba ∠cbe ∠dac ∠bcf

sum of interior angle is equal to opposite exterior angles

{   Exterior angle theorem }

answer is < CBE

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!