What goes on top? for the 16 and 17 ?

Each of the numbers in the Pyramid can be found by adding the two numbers in the layer below it. Looking at the second layer, 7 = 3 + 4, 9 = 4 + 5, and 8 = 5 + 3, and in the third layer, 16 = 7 + 9 and 17 = 9 + 8. The top brick should then be the sum of the two below it, or 16 + 17 = 33.

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true