If two angles of a triangle measure 43 degrees and 48 degrees the triangle is

2 answers:

lina2011 [118]3 years ago

8 0

If 2 angles measure 43 and 48.....then the third angle measures (180 - (43 + 48) = 89......so ur 3 angles are 43, 48, and 89...because the angles of a triangle add up to 180 degrees.

This is an acute triangle......an acute triangle is a triangle that has all 3 angles that are less then 90 degrees each.

seropon [69]3 years ago

7 0

The Triangle is Acute.

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A storage tank will have a circular base of radius r and a height of r. The tank can be either cylindrical or hemispherical (ha

Neko [114]

Answer:

Volume: $\frac{2}{3}\pi r^3$

Ratio: $\frac{2}{9}r$

Step-by-step explanation:

First of all, we need to find the volume of the hemispherical tank.

The volume of a sphere is given by:

$V=\frac{4}{3}\pi r^3$

where

r is the radius of the sphere

V is the volume

Here, we have a hemispherical tank: a hemisphere is exactly a sphere cut in a half, so its volume is half that of the sphere:

$V'=\frac{V}{2}=\frac{\frac{4}{3}\pi r^3}{2}=\frac{2}{3}\pi r^3$

Now we want to find the ratio between the volume of the hemisphere and its surface area.

The surface area of a sphere is

$A=4 \pi r^2$

For a hemisphere, the area of the curved part of the surface is therefore half of this value, so $2\pi r^2$ . Moreover, we have to add the surface of the base, which is $\pi r^2$ . So the total surface area of the hemispherical tank is