You can use the 1/2 x a x b x SinC formula
Take 2 sides and an angle in between
You know the angles in an equilateral triangle are 60o each. All the sides are 8cm.
Plug the values of the sides into a and b
Plug the value of the angle into C. You get
1/2 x 8 x 8 x Sin60 = 27.7cm2
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22.5 cm
is the perimeter of the triangle whose sides measure 7.5 7.1 and 8.1
It would help to know the definitions of acute and equilateral.An acute triangle is one whose angles are all less than 90o.An equilateral triangle is one whose sides are all the same, but that also means the angles will all be the same (60o)So, every equilateral triangle will be acute.Yes, a triangle can be both acute and equilateral.
It is a triangle whose 3 sides are equal in length and its 3 interior angles each measure 60 degrees
It is: 3*7 = 21cm