Tuesday, February 7th

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# Tuesday, February 7th - PowerPoint PPT Presentation

Tuesday, February 7th. Warm-Up. Please complete warm-up Take out homework (WB 10-1). Find the Area each figure 1. 2. 15 cm. 7.6 mm. 3.5 cm. Corny Joke of the Day a tribute to Tanner to week. What is invisible and smells like Bananas? “A monkeys burb”. Measurement Retest.

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## Tuesday, February 7th

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### Tuesday, February 7th

Warm-Up

Take out homework (WB 10-1)

Find the Area each figure

1. 2.

15 cm

7.6 mm

3.5 cm

Corny Joke of the Daya tribute to Tanner to week

What is invisible and smells like Bananas?

“A monkeys burb”

Measurement Retest

Reteach: WEDNESDAY

Retest:

FRIDAY

Can you find my mistakes?

• 63 yd²
• 96 mi²
• 10.5 in²
• 488 ft²
• 100 ft²
• 26 in²
• 260 ft²
Flashcard

Make one flashcards:

• Area of a Parallelogram

a=bh

A=Base x Height

Height

Base

Describe how finding the area of the parallelogram is like finding the area of a rectangle.

### Triangle Investigation

So the area of each triangle is half the area of the parallelogram.

Height

Height

Base

Base

Why Does This Work?

FORMULA

AREAOF A TRIANGLE

The area A of a triangle

is half the product of its

base band its heighth.

1

2

bh

A =

h

b

• Formula can be written as:
• The base and the height must form right angles!

Stop, Drop, and Watch

Find the area of the triangle.

1

2

bh

A =

Write the formula.

1

2

Substitute 20for b and 12for h.

(20· 12)

A =

1

2

Multiply.

(240)

A =

A = 120

The area is 120 ft2.

#1 Let’s Try Together!

Find the area of the triangle.

1

2

bh

A =

Write the formula.

1

2

Substitute 30for b and 24for h.

(30· 24)

A =

1

2

Multiply.

(720)

A =

A = 360

The area is 360 in2.

#2 You Try!

Find the area of the triangle.

1

2

bh

A =

Write the formula.

1

2

Substitute 5for b and 8for h.

(5· 8)

A =

8 in.

1

2

5 in.

Multiply.

(40)

A =

A = 20

The area is 20 in2.

1

2

Substitute 4 for b and 24for h.

(4 • 24)

A =

1

2

1

1

2

2

#3 You Try!

Find the area of the triangle.

1

2

bh

A =

Write the formula.

24 ft

1

2

Multiply.

(108)

A =

A = 54

4 ft

The area is 54 in2.

Practice

Problems

Practicing is how I won the superbowl!

3-2-1 Summary
• 3 things you learned about Areas so far
• 2 things that you need more practice on
• 1 thing you really like