Yes because if you add forty and thirty that equals seventy plus twenty is 90 which is a right angle
√20 = 4.47213
√20 = 4 (nearest integer)
√20 = 4.5 (nearest tenth)
Answer:
She needs to do at least 8 a day
Step-by-step explanation:
The shape at the top is a trapezoid with width 2 cm and lengths 4 and 8 cm.
Its area is
4+8
-------- 2 cm = 12 cm^2
2
The lower part consists of two congruent triangles. The area of a triangle is
A = (1/2)(b)(h). Here, A = (1/2) (4)(5.75) = 11.5, so the area of both triangles is 23 cm^2.
Thus, the total area is (12+23) cm^2, or 35 cm^2.
