Equilateral 2543

a) The perimeter of the equilateral triangle ABC is 63 cm. Calculate the side sizes of the triangle and its height.

b) A right isosceles triangle has an area of 40.5 square meters. How big is his circuit?

c) Calculate the square's area if the diagonal's size is 15 cm.

Correct answer:

a=b=c =  21 cm
h =  18.1865 cm
o =  30.7279 cm
S =  112.5 cm2

Step-by-step explanation:

a=b=c=63/3=21 cm

Try calculation via our triangle calculator.

h=3/2 (63/3)=18.1865 cm
o=(2+2) 2 40.5=30.7279 cm

Try calculation via our triangle calculator.

S=(15/2)2=112.5 cm2

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Tips for related online calculators
See also our right triangle calculator.
Calculation of an isosceles triangle.
Calculation of an equilateral triangle.
See also our trigonometric triangle calculator.

You need to know the following knowledge to solve this word math problem:

We encourage you to watch this tutorial video on this math problem: video1   video2

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