# Chapter 11: Areas of Plane Figures

Q1.

Tell what each letter represent in the formula.$A={s}^{2}$

Q1.

The base of a rectangle is12cmand height 5cm.What is the area?

Q1.

The area of the parallelogram can be found in two ways:

a.$A=8\cdot \_\_\_?\_\_\_=\_\_\_?\_\_\_$

b.$A=4\cdot \_\_\_?\_\_\_=\_\_\_?\_\_\_$

Q1.

A better approximation can be found by using 100 smaller rectangles with base vertices at$0,0.01,0.02,0.03,\mathrm{........},1.00$ . Change lines$10,20,40$ and 50 as follows:$\begin{array}{l}{10}^{}LE{T}^{}X=0.01\\ {20}^{}FO{R}^{}N={1}^{}T{O}^{}100\\ {40}^{}LE{T}^{}A=A+Y*0.01\\ {50}^{}LE{T}^{}X=X+0.01\end{array}$

RUN the program to approximate the area of the shaded region.

Q10.

The base of a rectangle is 40cmand perimeter is100cm. What is the area and height of the rectangle?

Q10.

Find the area of each figure:

An isosceles triangle with base10and Perimeter 36 .

Q10.

The base of a rectangle is$3\sqrt{2}cm$and height 2cm.What is the area?

Q11.

The base of a rectangle is$4\sqrt{2}$and height$\sqrt{2}$.What is the area?

Q11.

Find the area of each figure:

An isosceles right triangle with hypotenuse 8

Q11.

The base of a rectangle is 16cmand perimeter is42cm. What is the area and height of the rectangle?