Need help i will mark brainliest for the first and best answer

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

If you could answer these your a life saver

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)