Area and Perimeter of Plane FiguresPerimeter – distance around the polygonArea – number of square units needed to cover a figurePlane Figures Perimeter Area

1. Triangle a.

b.

a + b + c

3s

bh / 2

s2√34

2. Rectangle2l + 2w Lw

3. Square4s s

2

4. Trapezoidadd the measure of all

sides h(b1+b2)

2

5. Parallelogram2l + 2w Lh

6. Circleπd∨2πr π r2

IV. EvaluationA. Bookdrill:

Answer drills on pages 66 – 68

B. Notebook drills: Please refer to Geometry (Patterns and Practicalities) pages 71

– 73

Find the area and perimeter of the following1. 2.

5m 8ft

17 ft

3. 4.

5.

C. Solve1. A rectangular lot will be fenced using barbed wires. Its

dimensions are 24 m and 2000 meters. a. What is the minimum length of barbed wires to be used

to fence the whole lot?b. If a meter of barbed wire costs 135Php, how much will

be spent for the fencing?2. What is the area of the largest circle that can be cut from a

square cardboard which side measures 18 inches?