How do you find the area of any rectangle

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Can someone check if i did this correct. it’s number 4 if you’re wondering.