Review Lesson: 5 Slides (Grade 9)

5 Slides • 4 Questions

1

Review

2

Multiple Choice

Which of the following is a proportion?

1

$3:4\ and\ \ \ 4:3$

2

$2:3\ and\ 4:6$

3

Which of the following is a proportion?

Mean and Extremes
- Two ratios are proportion, if the product of the means is equal to the product of the extremes.

3:4=4:3

2:3=4:6

16\ne9

12=12

4

Multiple Choice

Solve for the value of x in the proportion $\frac{2x}{3}=\frac{x+7}{5}$ ?

1

x=7

2

x=3

5

In finding the unknown in proportion, we use Cross Product Property.

$\frac{2x}{3}=\frac{x+7}{5}$
$10x=3\left(x+7\right)$
$10x=3x+21$
$10x-3x=21$
$7x=21$ $x=3$

6

Multiple Choice

$\Delta ABC\cong\Delta DEF$ , which side corresponds to $\overline{AC}$ ?

1

$\overline{DE}$

2

$\overline{DF}$

7

8

Multiple Choice

Given the figures, what is the ratio of the length of $\overline{AP}$ to $\overline{CM}$ ?

1

3:1

2

1:3

9

Review

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