The diagram shows a rectangle, ABDE, and two congruent triangles, AFE and BCD.
area of rectangle ABDE = area of triangle AFE + area of triangle BCD
AB: AE = 1:3
Work out the length of AE.
In all working, let the length of AE be a cm.

What is the difference between regular convex and concave polygons

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Need on this geometry question. explain how you did it.