iMath | Community

Aurelia Tan

Asked 9 years ago

SG Primary 6 Number and Algebra

Replies 3

Aurelia Tan

Different way of asking. Try it for p6

6 years ago

Kho Tek Hong

In 1 min, Ivan travelled 15 m more than his sister. 15 m --> 1 min 480 m --> 32 min Time taken = 32 min Distance between school and library = 80 x 32 = 2560 m

6 years ago

Pieter Cronje

6 years ago

Adrian Ng

Asked 9 years ago

SG Primary 4 Fractions

Making it visual...

Replies 0

Adaik Valli

Asked 9 years ago

SG Primary 5 Measurement

Please help me to solve the problem. Thanks in advance.

Replies 7

Zhong Shu Hao

Area of triangle is : 0.5 x base x height If the area is doubled, but the base stays the same, what can you say about the height?

6 years ago

Zhong Shu Hao

Let the length of DE be of length "h" and length of EB be of length "b". Then, CF = b, FE = b, EB = b. Since the base of triangles ACF and DEB are the same, but the area of ACF is twice of DEB, we can say that the height of triangle ACF (which is AF) is twice the height of triangle DEB, (which is h cm). Hence, length if AF is 2 x h = 2h cm. Area of ABC = 0.5 x AF x BC = 0.5 x 2h x 3b = 0.5 x 2 x 3 x h x b = 6 x (0.5 x h x b) = 6 x Area of triangle DEB = 6 x 13.7cm^2 = 82.2cm^2 .

6 years ago