8.1 Ratio and Proportion.

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Presentation transcript:

8.1 Ratio and Proportion

Definition of a Ratio A fraction comparing same units. Example : 2 feet to 4 inches. Change to the same unit. 24 inches to 4 inches = 24/4 = 6/1 6 to 1

Reduce Do not need the units in final answer.

Reduce Do not need the units in final answer.

What are the sides if the perimeter is 56 inches Isosceles triangle LNM

What are the sides if the perimeter is 56 inches Isosceles triangle LNM Sides 16, 20, 20

What is the Ratio of LM:MN Isosceles triangle LNM

What is the Ratio of LM:MN Isosceles triangle LNM

Ratio of angle of a triangle is 3:4:8 What are the angles? 3x + 4x + 8x = 180 15x = 180 x = 12

Ratio of angle of a triangle is 3:4:8 What are the angles? x = 12 3(12), 4(12), 8(12) 36, 48, 96

QRS corresponds to VTU 3:2 Find TU, QS and TV

Proportions compares different units

Proportions compares different units

Solve Find x

Solve Find x

Homework Page 461 – 464 # 12, 16, 20, 24, 28, 32, 36, 40, 44, 45 – 47, 51 – 61, 62 – 74 even