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3 years ago

A triangle has sides of lengths 9, 7, and 12. Is it a right triangle? Explain.

Mathematics

1 answer:

Tresset [83]3 years ago

8 0

Answer:

No, $9^2 +7^2 \neq 12^2$

Step-by-step explanation:

$9^2 +7^2 = 81+ 49 =130...(1)$

$12^2 = 144...(2)$

From equations (1) & (2) it is obvious that:

$9^2 +7^2 \neq 12^2$

Thus, the given is not a right triangle.

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Can someone please answer this???? ASAP

timofeeve [1]

Answer:

A. $y=-\dfrac{8}{7}x-\dfrac{18}{7}$

Step-by-step explanation:

Let $y=mx+b$ be the equation of the perpendicular line.

Two perpendicular lines have slopes with product equal to -1. The slope of the given line is $\frac{7}{8}$ Hence,

$\dfrac{7}{8}\cdot m=-1\\ \\m=-\dfrac{8}{7}$

is the slope of needed line.

This line passes through the point (-4,2), so its coordinates satisfy the equation:

$2=-\dfrac{8}{7}\cdot (-4)+b\\ \\b=2-\dfrac{32}{7}=-\dfrac{18}{7}$

Therefore, the equation of the line is

$y=-\dfrac{8}{7}x-\dfrac{18}{7}$

7 0

3 years ago

What is the volume of the figure composed of two congruent triangular prisms if a = 5 units, b = 3 units, and c = 6 units?

Gekata [30.6K]

Answer:

45 cubic units

Step-by-step explanation:

Vtotal = 1/2 (2.5*3) * 6 *2

where

2.5 is the base

3 is the height

6 is the length

2 is the number of prisms

5 0

2 years ago

Read 2 more answers

What is the value of x?

frutty [35]

Hello! I am happy to help you.

Here, x=36.

2*36=72*2=144+36=180. A triangle's measure equals 180.

Hope this helps!

6 0

3 years ago

A tree broke 6 feet from the bottom. If the top landed 12 feet from the base, how tall was the tree before it broke?

spayn [35]

Answer:

7.4 ft

Step-by-step explanation:

7 0

3 years ago

Find the value of X so that this quadrilateral is a parallelogram. Then substitute the value of X and using the parallelogram an

Bogdan [553]

Answer:

x = 36

m/A = 132

m/B = 48

m/C = 48

m/D = 132

4 0

3 years ago