The sides of a triangle are in the ratio 3:5:7 and its perimeter is 45 cm. What are the
lengths of the sides?
Share
The sides of a triangle are in the ratio 3:5:7 and its perimeter is 45 cm. What are the
lengths of the sides?
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
The length of the sides be 9cm, 15cm, 21cm
Step-by-step explanation:
Let the sides of the triangle be
Hence,
Therefore the length of the sides be
perimeter of the triangle =60cm
3x+5x+7x=60
⇒15x=60
⇒x=60/15
⇒x=4
3x=3×4=12cm
5x=5×4=20cm
7x=7×4=28cm
S= 1/2(a+b+c)
= 1/2×60
=30
Area = 30(30−12)(30−20)(30−28)
= 30×8×10×2
= 60×180
= 10800
= 3600×3
=60 ÷ 3cm ²
Area of triangle =60 ÷3cm²
Hope it helps ❤️