Isosceles trapezoid

The bases of the isosceles trapezoid are in the ratio of 5:3. The arms have a length of 5 cm and height = 4.8 cm. Calculate the circumference and area of a trapezoid.

Correct answer:

o =  21.2 cm
S =  26.88 cm2

Step-by-step explanation:

r=5 cm v=4.8 cm  x2+v2=r2=52=25 x=r2v2=524.82=57=1.4 cm  3 a=5 c x=(ac)/2 3 a=5 c 1.4=(ac)/2  3a5c=0 ac=2.8  Row231 Row1Row2 3a5c=0 0.67c=2.8  c=0.666666672.8=4.2 a=30+5c=30+5 4.2=7  a=7 c=521=4.2  o=a+c+2 r=7+4.2+2 5=21.2 cm
S=2a+c v=27+4.2 4.8=25672 cm2=26.88 cm2

Did you find an error or inaccuracy? Feel free to write us. Thank you!

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

Related math problems and questions: