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2 years ago

The triangle below is a right triangle. What is the length of the missing side? Round your answer to the nearest whole number?

Mathematics

2 answers:

Alex73 [517]2 years ago

5 0

Answer: D

Step-by-step explanation:

We can eliminate 7 and 11 because the length has to be longer than 12 (called hypotenuse, it is the longest side of a triangle). And 225 is kind of ridiculous. We can also use the Pythagorean Theorem which applies to all right angle triangles to figure out the hypotenuse, so 9^2 (81) + 12^2 (144) = x^2. So then, 81 plus 144 is about 225. And the square root of 225 is 15, therefore the answer is 15. Hope this helps!

lisabon 2012 [21]2 years ago

3 0

Answer: C) 15

Step-by-step explanation:

Use the Pythagorean theorem

$x^{2}$ = $12^{2}$ + $9^{2}$

$x^{2}$ = $225$

$x = \sqrt{225}$

$x = 15$

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Step-by-step explanation:

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Dmitry [639]

Answer:

$3x+2 \ne x^2 \ne 2x$ for $x = 4$

Step-by-step explanation:

Given

Shape: Triangle

Dimension: 3x + 2, x^2 and 2x

$x = 4$

Required

Determine if it has equal sides

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2 years ago

Please help me!

marusya05 [52]

Answer:

Step-by-step explanation:

Nice summary problem.

<AEC

AEC = 360 - 243.5 = 116.5
The number of degrees in 1 rotation of a circle = 360o. You have accounted for 243.5 degrees. What is left over is the answer.

<EAD and <ECD

Both of these are tangents to a circle. Tangents meet radii at 90 degree angles.

<EAD = <ECD = 90 degrees

<ABC

<ABC is 1/2 the central angle. The Central angle is <AEC

< AEC = 116.5
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There are 2 ways of doing this. You should know both of them.

One

All quadrilaterals = 360 degrees. You know three of the angles. You should be able to find ADC

<ADC + 90 + 90 + 116.5 = 360 Add the four angles together.
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Method Two

<ADC = 1/2 (major Arc - Minor Arc) This formula is fundamental to circle / tangent properties. The Major arc is the larger of the two parts of the circumference of a circle. The Minor arc is the smaller.

<ADC = 1/2(243.5 - 116.5)
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