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Black_prince [1.1K]
2 years ago
9

Do these numbers form a right triangle? 15,12,21 please help

Mathematics
1 answer:
bazaltina [42]2 years ago
8 0
No they do not form a right triangle
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Write an equation in standard form that has a slope of -1 and passes through the point (-5, -1).
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x + y = -6

Step-by-step explanation:

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Find the measures of the interior angles and please tell me all angles
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Angle A = 59
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Find the midpoint of A and B where A has coordinates (-5, 3)<br> and B has coordinates (3,-1)
yaroslaw [1]

Answer:

(-1, 1)

Step-by-step explanation:

Midpoint formula: (x₁ + x₂/2 , y₁ + y₂/2)

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3 years ago
Find the surface area of the composite figure.
ELEN [110]

Answer:

644cm^2

Step-by-step explanation:

First we'll work out the surface area of the pink figure.

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However, we note that the purple figure is blocking out a 6 by 12 section on the pink figure, so we'll need to subtract this.

The above works out to 2\times(30+100+120)-72=428 cm^2.

Then we'll work out the surface area of the purple figure.

This will be the area of the two 4 by 6 rectangles at the top and bottom, plus the area of the two 4 by 12 and one 6 by 12 rectangles on the sides. Note that there's only one 6 by 12 rectangle because the other face is joined to the pink figure, so it's blocked out.

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So the total surface area is 428+216=644cm^2.

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Can someone help me with this? It's due tomorrow
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3 years ago
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