3 years ago

What degree of rotational symmetry does an equilateral triangle have

1 answer:

ivann1987 [24]3 years ago

7 0

Answer: There are three rotational symmetries of an equilateral triangle: rotation by zero degrees (the identity operation), rotation by 120 degrees, and rotation by 240 degrees. This group of symmetry operations is isomorphic to the cyclic group of 3 elements: [math]C_3.[/math]

Step-by-step explanation:

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THE RIGHT ANSWERRRRRR

Mkey [24]

Area of semicircle = 1/2 the area of a circle:
$A_{sc}=\frac{1}{2} \pi r^{2}$
radius is half the diameter of 6ft.
$A_{sc} = \frac{1}{2} \pi (3^{2} )=14.13 ft^{2} .$
Area of the rectangle:
$A_{r} =lw=15*6=90 ft^{2} .$
Add the two together:
90 + 14.13 = 104.13
Round to the nearest tenth (one decimal place)
Area = 104.1 square feet.

4 0

4 years ago

A triangle has sides with lengths of 7 yards, 12 yards, and 13 yards. Is it a right triangle?

sergey [27]

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Step-by-step explanation:

4 0

3 years ago

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QUESTION 5 What is the area of the trapezoid?

mr Goodwill [35]

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