Download presentation

1
**Perimeter and Area of Composite Figures**

2
Composite Figure: a figure that is made by combining triangles, quadrilaterals, semi-circles and other two-dimensional figures.

3
**Perimeter: Is the distance around a figure**

7 cm 5 cm 3 cm ? 7 cm 4 cm P = 7 cm + 5 cm + 4 cm + 7 cm cm P = cm The perimeter of a circle has a special name, It is called the ______________, and is found using either of these formulas: circumference

4
**Alice needs to purchase 37 feet of border.**

Alice is putting a wallpaper border around her bedroom. She must find the __________ of her bedroom in order to purchase the correct amount of border. perimeter 12 ft 3 ft ? 4 ft 6.5 ft ? 3.5 ft 8 ft P = 8 ft + 6.5 ft + 12 ft + 3 ft + 4 ft + 3.5 ft Alice needs to purchase 37 feet of border.

5
The area of a composite figure can be found by adding or subtracting the areas of the simpler figures that compose the composite figure. Area of Semi-Circle + Area of Rectangle + Area of Triangle

6
**Joe has to mow the lawn of the field below, how many square yards must he mow?**

14 yd 3 yd 10 yd 10 yd 6 yd 6 yd 8 yd 8 yd Area of Semi-Circle + Area of Rectangle + Area of Triangle

7
**Is there another way of finding this area?**

Detective LeRue must investigate a crime committed at the local park. How many square meters of ground must he cover when looking for clues? Total area = 28 m m m2 = 65 square meters Is there another way of finding this area? Area = 4 m (7 m) Area = 4 m(4 m) 4 m 3 m 3 m Area =3 m(7 m) 4 m 28 m2 7 m 21 m2 7 m 16 m2

8
**How can we use subtraction to find the area?**

Step 1: Find area of big rectangle Step 2: Find area of smaller rectangle Step 3: Subtract the smaller area from the larger area Total area = 77 m2 – 12 m2 = 65 square meters How can we use subtraction to find the area? 11 m 4 m 4 m 3 m 3 m Area = 3 m(4 m) 4 m 7 m 7 m Area =7 m (11 m) =12 m2 = 77 m2

9
**Detective LaRue must isolate the crime scene, **

how much tape will he need? Perimeter = 7m + 4 m + 3 m + 4 m + 3 m + 3 m + 7 m + 11 m Detective LaRue needs 42 meters of crime scene tape. 4 m 3 m ? 3 m 4 m 7 m 7 m ?

10
**Area = 74 cm2 Perimeter = 40 cm 1. Find the area and perimeter 6 cm**

11
**Area = 2300 in2 Perimeter = 240 in 2. Find the area and perimeter**

12
**Area = 30 yd2 Perimeter = 29 yd 3. Find the area and perimeter 3 yd**

13
**Area = 88.26 ft2 Perimeter = 38.84 ft 4. Find the area and perimeter.**

Use 3.14 for π Area = ft Perimeter = ft

14
**Area = 212.75 km2 Perimeter = 69.7 km 5. Find the area and perimeter**

15
**6. Find the area and perimeter**

Area = 97.5 m2 Perimeter= 36 m 3 m 12.5 m 7.5 m 13 m

16
**7. Find the area of the arrow.**

Area = 90 ft2

17
**Area = 437.5 mm2 8. Find the Area of the Shaded Region.**

Use 3.14 for π . Area = mm2

Similar presentations

OK

Section 1.7. Recall that perimeter is the distance around a figure, circumference is the distance around a circle, and area is the amount of surface covered.

Section 1.7. Recall that perimeter is the distance around a figure, circumference is the distance around a circle, and area is the amount of surface covered.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on reflection of sound waves Ppt on grooming and etiquettes Ppt on south african culture facts Ppt on market friendly state for retirement Notebook backgrounds for ppt on social media Ppt on history and sport the story of cricket Ppt on project management consultancy Ppt on abstract artists Free ppt on history of cricket Ppt on different types of forests images