Hemisphere o with radius 6 cm is given in the figure on the picture. when rotating it 30 degrees with b, which is one end of the diameter ab, as the center of rotation, answer the following questions.

①find the circumference of the shaded part

②find the area of the shaded part

how do i solve!

What is the sum or difference 4x10 – 9x10 (1 point) –5x10 –5x20 –36x10 –36x20 this is the cca test i need all the answers this is the first 2

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

Which statements regarding the diagram are true? check all that apply.