1. Given that ÐG is a supplement of ÐH, and mÐG is 82°, what is mÐH?

98 2. Given that ÐG is a complement of ÐH, and

mÐG is 28°, what is mÐH? 62 3. ÐT and ÐS are supplementary. The measure

of ÐT is half the measure of ÐS. Find mÐS. 120 & 60 4. ÐT and ÐS are complementary. The measure

of ÐT is half the measure of ÐS. Find mÐS. 60 & 30 5. ÐT and ÐS are supplementary. The measure

of ÐT is two times the measure of ÐS. Find mÐS.

60 & 120

5- Minute Check

Find perimeter, Find perimeter, Circumference & AreaCircumference & Area

Section 1.7Section 1.7

Standard 3: Students will understand geometric concepts and applications.

Objectives: Find the perimeter, circumference and area

of common plane figures. Use a general problem-solving plan. Mastery is 80% or Better on 5-Minute Checks

Standards/Objectives:

PerimeterP=2l +2w

AreaA=lw

RectangleRectangle

l

(length)

W

(width)

Perimeter- 1deminsional

P=4s

Area 2 deminsional

A=s2

SquareSquare

S

(side)

PerimeterP=a+b+c

AreaA= ½ bh

TriangleTriangle

b

(base)

h

(height)

a c

Diameterd=2r

CircumferenceC=2πr

AreaA=πr2

Circle

diameterradius

** Always use the π button on the calculator; even when the directions say to use 3.14.

Compare and Contrast the differences and similarities between Perimeter and Circumference.

Pair Share

P=2l +2w P=2(5in)+2(3in) P=10in+6in

P=16in

A=lw A=(5in)(3in) A=15in2

Example: Find the perim. & area of the figure.

3 in

5 in

P=4sP=4(20m) P=80m

A=s2

A=(20m)2

A=400m2

Ex: Ex: Find the perimeter & area of the figure.

20 m

P=a+b+cP=5ft+7ft+6ftP=18 ft

A= ½ bhA= ½ (7ft)(4ft)A= ½ (28ft2)A= 14ft2

Ex: Find the perimeter & area of the figure.

7 ft7 ft

5 ft5 ft

4 ft4 ft

6 ft6 ft

How do you find the height of a triangle to find area?

Does the slant height differ from the regular height? Explain a situation where this might be the same.

Quick Write

C=2πrC=2π(5in)C=10π inC≈31.4 in

A=πr2

A=π(5in)2

A=25π in2

A≈78.5 in2

Ex: Find the circumference & area of the circle.

10in

10in

Standard 3: Students will understand geometric concepts and applications.

Objectives: Find the perimeter and area of common

plane figures. Use a general problem-solving plan. Mastery is 80% or Better on 5-Minute Checks

What was the Objective(s)?

Quiz tomorrow over 1.4, 1.5 & 1.7

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# 2-30 Even

On Your Own