Area of Triangles

Area of Triangles

What do you notice about all these triangles?

What’s the area of this rectangle?

Area= length * width

10 cm

6 cm

Multiple Choice

What is the area of this rectangle?

• $$6\ cm^2$$

• $$10\ cm^2$$

• $$60\ cm^2$$

• $$30\ cm^2$$

What’s the area of the red triangle?

10 cm

6 cm

Area of a triangle

base

height

Multiple Choice

What is the area of the red triangle?

• $$6\ cm^2$$

• $$10\ cm^2$$

• $$60\ cm^2$$

• $$30\ cm^2$$

What’s the area?

8 cm

4 cm

16 cm2

(8 * 4) 2 =

What’s the area?

8 cm

8 cm

What’s the area?

8 cm

8 cm

32 cm2

Multiple Choice

What is the area of the blue triangle?

• $$64\ cm^2$$

• $$8\ cm^2$$

• $$32\ cm^2$$

• $$16\ cm^2$$

Your Turn: What’s the area?

8 cm

3 cm

14 cm

2 cm

Multiple Choice

What is the area of the orange triangle?

• $$24\ cm^2$$

• $$12\ cm^2$$

• $$8\ cm^2$$

• $$3\ cm^2$$

Multiple Choice

What is the area of the purple triangle?

• $$28\ cm^2$$

• $$14\ cm^2$$

• $$50\ cm^2$$

• $$2\ cm^2$$

What’s the area?

20cm

15cm

Multiple Choice

What is the area of the yellow triangle?

• $$20\ cm^2$$

• $$15\ cm^2$$

• $$300\ cm^2$$

• $$150\ cm^2$$

What’s the area?

20 cm

8 cm

18 cm

Multiple Choice

What is the area of the green triangle?

• $$80\ cm^2$$

• $$180\ cm^2$$

• $$360\ cm^2$$

• $$160\ cm^2$$

Multiple Choice

Area of triangle?

• 17 units²

• 20 units²

• 10 units²

• 16 units²

Multiple Choice

Find the area of this triangle.

• 150 ft²
• 100 ft²
• 50 ft²
• 35 ft²

Multiple Choice

Area or triangle?

• 20 cm²
• 56 cm²
• 28 cm²
• 27 cm²

Multiple Choice

Find the area of the figure:

• 30 ft²
• 60 ft²
• 16 ft²
• 36 ft²

Multiple Choice

A triangle with a height of 8 mm and a base of 7 mm has an area of what?

• 56 mm squared
• 15 mm squared
• 28 mm squared
• 87 mm squared

Multiple Choice

What is the height of this triangle?

• 10 m

• 14 m

• 140 m²

• 70 m²

Multiple Choice

What is the area of this triangle?

• 10 m

• 14 m

• 140 m²

• 70 m²

Multiple Choice

What is the area of this figure?

• 48

• 24

• 60

• 30

Multiple Choice

What is the height of this triangle?

• 7 cm

• 8 cm

• 28 cm²

• 6 cm

Multiple Select

What is the formula to find the area of a triangle? (choose all that apply)

• A = bh

• $$A\ =\ bh\div2$$  

• $$A\ =\frac{1}{2}bh$$  

• $$\ A\ =\ h\left(b\ +\ b\right)\div2$$  

Now please work on:

PAGE 380 (#1-3) AND 381 (#4-13)

A= bh
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