CAN YOU PLS HELP ME WITH THE FIRST QUESTION NOT THE EXAMPLE THE FIRST QUESTION

Find the length of cu, the triangles are similar.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality