Princessheen26idn
Answered

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III Find the Volume: (5 points each) 5 mm 5 mm 5 mm 3.5 cm 1 Side= 4.5 cm 3.5 cm 2 3 side = 3.2 cm 4.5= 3.4 cm

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Sagot :

Rommelmdelrosarioidn

Answer:

Calculate the surface area of the triangles no. 1, no. 1a and no. 2

Step-by-step explanation:

For example,

Given

Answer

Triangles no. 1 and no. 1a:

base = 3 cm

height = 2 cm

Formula:

A = 0.5 x base x height

= 0.5 x 3 cm x 2 cm = 3 cm2

Triangle no. 2:

base = 3 cm

height = 2 cm

A = 0.5 x 3 cm x 2 cm = 3 cm2

It can be seen that triangles no. 1, no. 1a and no. 2 have the same surface; the shapes of the triangles are different, but the base and the height are in all three cases the same, so the surface is the same.

The surface of these triangles is expressed in square centimetres (written as cm2). Surface areas can also be expressed in square decimetres (dm2), square metres (m2), etc...

QUESTION

Calculate the surface areas of the triangles nos. 3, 4, 5 and 6.

Given

Answer

Triangle no. 3:

base = 3 cm

height = 2 cm

Formula:

A = 0.5 x base x height

= 0.5 x 3 cm x 2 cm = 3 cm2

Triangle no. 4:

base = 4 cm

height = 1 cm

A = 0.5 x 4 cm x 1 cm = 2 cm2

Triangle no. 5:

base = 2 cm

height = 3 cm

A = 0.5 x 2 cm x 3 cm = 3 cm2

Triangle no. 6:

base = 4 cm

height = 3 cm

A = 0.5 x 4 cm x 3 cm = 6 cm2

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