## Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.

## Question

primary 5 | Maths
| Area & Volume

** One Answer Below **

Anyone can contribute an answer, even non-tutors.

**Answer This Question**

Pls help

The formula is as such: Area of triangle=

√(Sx(S-A)x(S-B)x(S-C)) where A, B and C are all the respective lengths of triangle's sides and S is the perimeter divided by 2. √ is the symbol for square root

Hence the answer is:

√(21x(21-13)x(21-14)x(21-15))

=√(21x8x7x6)

=84 cm squared

### See 1 Answer