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Determine the perimeter of a complex shape

Obj. #45. Determine the perimeter of a complex shape. Perimeter- the distance around a shape. 3cm. Some common formulas for perimeter: Square- P=4s or P=s+s+s+s Rectangle- P=2(l + w). 4x3=12cm ~or~ 3+3+3+3= 12cm. 3cm. 6cm. 2cm. 2.5cm. 2.5cm. 2(2 +6)=16cm ~or~ 2+6+2+6=16cm.

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Determine the perimeter of a complex shape

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  1. Obj. #45 Determine the perimeter of a complex shape Perimeter- the distance around a shape 3cm Some common formulas for perimeter: Square- P=4s or P=s+s+s+s Rectangle- P=2(l + w) 4x3=12cm ~or~ 3+3+3+3= 12cm 3cm 6cm 2cm 2.5cm 2.5cm 2(2 +6)=16cm ~or~ 2+6+2+6=16cm 2.5+2.5+2=7cm 2cm

  2. Objective #45 (continued) I need to be sure to add all sides *The center shape is a square. **The triangles are congruent. 3.5cm 3cm 3+3.5+3.5+3.5+3.5+3=20cm

  3. Obj. #46 Determine the area of a complex shape Area- The amount of space an object takes up 3cm Some common formulas for area: Square- A=s2 A=s x s Rectangle- A=l x w Triangle- A=(bxh)/2 32=9cm2 ~or~ 3x3=9cm2 3cm 2cm 6cm 6x2=12cm2 4cm 3x4=12/2=6cm2 3cm

  4. Objective #46 (continued) I need to be sure to add the areas of all shapes *The center shape is a square. **The triangles are congruent. 2cm 3cm Square- 32=9cm2 Triangle 1- (3x2)=6 6/2=3cm2 Triangle 2- (3x2)=6 6/2=3cm2 Area of complex shape- 9+3+3=15cm2

  5. Obj. #47 WP: Determine the area or perimeter of a complex shape Some ways to know if you need to find area or perimeter: • Anything that is fenced in or enclosed is perimeter • If you’re carpeting, cementing, painting, etc. you need to find area

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