## 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**

Please help, thank you

= 10 units

Area of triangle D

= 1/2 x vertical height x SR = 3 units

Since area of triangle D = 3/10 of area of rectangle,

1/2 x vertical height = 3/10 of RQ

Vertical height = 6/10 of RQ = 3/5 of RQ

Since RQ = vertical height of triangle B

+ vertical height of triangle D,

Vertical height of triangle B

= 2/5 of RQ

Triangle B area = 2/5 of RQ x 1/2 x SR

= 2/10 x RQ x SR

= 1/5 x area of rectangle

= 2 units

So 58 cm² = 2 units

1 unit = 29 cm²

Rectangle area = 10 units

= 29 cm² x 10

= 290 cm²

### See 1 Answer

*done*{{ upvoteCount }} Upvotes

*clear*{{ downvoteCount * -1 }} Downvotes