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2 years ago

15

What is the area of the triangle?

1 answer:

liberstina [14]2 years ago

3 0

Answer:

48

Step-by-step explanation:

A = bh/2

A= 8 x 12 / 2

A= 96 / 2

A = 48

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Please help!! MathsWatch, Surd Expressions, Clip 207c

dexar [7]

Answer:

$A=(72+36\sqrt{3})\ mm^2$

Step-by-step explanation:

see the attached figure with letters to better understand the problem

Let

a ----> the height of rectangle in mm

b ---> the base of rectangle in mm

step 1

Find the base of rectangle

$b=AB+BC+CD+DE$ ----> by segment addition postulate

substitute

$b=3+3+3+3=12\ mm$

step 2

Find the height of rectangle

$a=FB+CG+GH$ ---> by segment addition postulate

substitute the given values

$a=3+CG+3\\a=6+CG$

Find the length sides CG

Applying the Pythagorean Theorem

$BG^2=BC^2+CG^2$

substitute the given values

$6^2=3^2+CG^2$

$CG^2=6^2-3^2$

$CG=\sqrt{27}\ mm$

simplify

$CG=3\sqrt{3}\ mm$

therefore

$a=(6+3\sqrt{3})\ mm$

step 3

Find the area of rectangle

$A=ab$

we have

$a=(6+3\sqrt{3})\ mm$

$b=12\ mm$

substitute

$A=(6+3\sqrt{3})(12)=(72+36\sqrt{3})\ mm^2$

8 0

3 years ago

Create a proportion using the form = to represent the following word problem.

olga nikolaevna [1]

Answer:

60/100 and x/20 and x=12

Step-by-step explanation:

60 % of 20

60/100 = x/20

cross product

60 * 20 = 100x

divide by 100

1200/100 =x

12=x

Answer:60/100 = x/20 x= 12

hope it's right

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3 years ago

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35 devide 28 with decimals pls help

algol [13]

Answer:

1.25

Step-by-step explanation:

The answer in decimal is 1.25

35/28= 1.25

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2 years ago

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WILLL GIVE A BRAINLEST

lord [1]

It is B. simple random sample

5 0

3 years ago

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PLZ HELP ASAP<br> Find the value of the variable.<br><br>A. -37<br><br>B.31<br><br>C.43<br><br>D.155

harkovskaia [24]

Answer:

B.31

Step-by-step explanation:

That's the answer.

3 0

3 years ago

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