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3 years ago

Area of composite shapes Find the area of the shape shown below.

Mathematics

2 answers:

RoseWind [281]3 years ago

6 0

Answer: 18

Step-by-step explanation:

Here you have two triangles and a square. Or what's also called a trapezoid.

$A=\frac{a+b}{2}h$

a = shorter side = 3

b = longer side = 9

h = height = 3

$A=\frac{3+9}{2}(3)$

$A=\frac{12}{2}(3)$

$A=6*3\\A=18$

Salsk061 [2.6K]3 years ago

4 0

Answer:

18units

Step-by-step explanation:

3+9=12

12/2=6

6*3=18

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Two of the interior angles of a triangle are 50° and 75°. Which of the following could be a measure of an exterior angle of the

Karolina [17]

Answer:

Step-by-step explanation:

so, 50+75=125.

180-125=55.

There can be-

130, 95, and 125

8 0

2 years ago

Solve the right triangle, ΔABC, for all the missing side and angles to the nearest tenth given sides a = 10.6 and b = 19.2.

Aliun [14]

Answer:

Part 1) $c=21.9\ units$

Part 2) $B=61.1\°$

Part 3) $A=28.9\°$

Part 4) $C=90\°$

Step-by-step explanation:

step 1

Find the length side c

Applying the Pythagoras Theorem

$c^{2}=a^{2}+b^{2}$

substitute the given values

$c^{2}=10.6^{2}+19.2^{2}$

$c^{2}=481$

$c=21.9\ units$

step 2

Fin the measure of angle B

we know that

In the right triangle

$tan(B)=b/a$

substitute the given values

$tan(B)=19.2/10.6$

$B=arctan(19.2/10.6)=61.1\°$

step 3

Find the measure of angle A

we know that

The measure of interior angles in a triangle must be equal to 180 degrees

∠A+∠B+∠C=180°

Remember that in a right triangle the measure of angle C is 90 degrees

we have

$B=61.1\°$

$C=90\°$

substitute

$A+61.1\°+90\°=180\°$

$A=28.9\°$

4 0

2 years ago

What does X equal 9.6x − 15.4 = −4.4x − 11.2 A.) x = 0.3 B.)x=−0.3 C.) x = −3 D.) x = 3

sweet [91]

The answer is A) x=0.3

Step-by-step explanation:

Move all terms containing xx to the left side of the equation.

14x−15.4=−11.2

Move all terms not containing x to the right side of the equation.

14x=4.214x=4.2

Divide each term by 14 and simplify

x=0.3

3 0

3 years ago

The side lengths of a triangle are 6, 8, and 12. Is this a right triangle?

gizmo_the_mogwai [7]

<h2><u>D.</u></h2><h3>It's incorrect, because 6 squared = 36, 8 squared = 64, add them together and you get 100. 12 squared does NOT equal 100, it equals 144.</h3>

<em>(To find the hypotenuse {longest side of the triangle}, you square the two short sides, add them together, and finally, divide it by the provided number, and see if the number matches the provided number's square.)</em>

<h3>Brainly if correct and Thanks!</h3>

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nataly862011 [7]

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3 years ago

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