Write the types of triangles drawn below

Mathematics

2 answers:

zhenek [66]3 years ago

4 0

A. Right triangle (it has a right angle)
b. An equilateral triangle and equiangular triangle (equal sides means equal angles)
c. Right triangle (right angle)
d. Obtuse triangle (an angle greater than 90 degrees)
e. Isosceles triangle (two equal sides)
f. Scalent triangle (three different side lengths)
g. Acute triangle (angles less than 90 degrees)
h. Isosceles triangle (two equal sides because two angles are equal)
i. Equilateral and equiangular (any triangle that is equiangular is equilateral)

podryga [215]3 years ago

4 0

Right triangle
b. An equilateral triangle and equiangular triangle
c. Right triangle
d. Obtuse triangle
e. Isosceles triangle
f. Scalent triangle
g. Acute triangle
h. Isosceles triangle l
i. Equilateral and equiangular

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A large washer has an outer radius of 10mm and a hole with a diameter of 14mm. What is the area of the top surface of the washer

choli [55]

<h2>Answer:</h2>

The area of the top surface of the washer is: 160.14 square mm.

<h2>Step-by-step explanation:</h2>

The top of the surface is in the shape of a annulus with a outer radius of 10 mm and a inner radius of 7 mm ( since the diameter of the hole is: 14 mm and we know that the radius is half of the diameter)

Now, we know that the area of the annulus region is given by:

$Area=\pi (R^2-r^2)$

where R is the outer radius and r is the inner radius.

Here we have:

$R=10\ mm\\\\and\\\\r=7\ mm$

Hence, we have:

$Area\ of\ top\ surface=\pi (10^2-7^2)\\\\i.e.\\\\Area\ of\ top\ surface=\pi (100-49)\\\\i.e.\\\\Area\ of\ top\ surface=\pi\cdot 51\\\\i.e.\\\\Area\ of\ top\ surface=160.14\ mm^2$