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What is the value of X

A 21
B 41
C 20
D 22

What is the value of X A 21 B 41 C 20 D 22-example-1
User Jhilgeman
by
7.9k points

1 Answer

2 votes

Answer:

22

Explanation:

Let the bottom be y for the small triangle

So the total length of the bottom is 2y

We can use ratios to solve

x-1 1y

----- = --------

42 2y

Canceling the y's

x-1 1

----- = --------

42 2

Using cross products

2(x-1) = 42

Divide by 2

x-1 = 21

Add 1 to each side

x-1+1=21+1

x = 22

User Sunil Tc
by
8.1k points

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