Gr - 8 Revision

The diameter of a circle, with radius 6 cm=

• 3cm
• 12cm
• 6cm
• 15cm

Value of Pi =

• 31.9
• 3.19
• 3.14
• 31.4

Formula for area of a triangle =

•     ½ bh
• 2bh
• 2(b+h)
•   ½ (b+h)

…………………………………… is part of the circumference of a circle.

• chord
• segment
• sector
• arc

 $Factorize:\ p^2-15q-5p+3pq$ 

•  $\left(p+3q\right)\left(p-5\right)$  

•  $\left(p+5\right)\left(q+3\right)$  

 $Factorize:\ 4x^2-9y^2$  

•  $\left(4x+9y\right)\left(4x-9y\right)$  

•  $\left(2x+3y\right)\left(2x-3y\right)$  

 $Resolve\ into\ factors:\ 2x^2+9x+10$  

•  $\left(2x+5\right)\left(x+2\right)$  

•  $\left(2x+9\right)\left(x+10\right)$  

 $FindHCFof:4a^2b^2c^2\ and\ 12c^2d^2e^2$  

•  $4c^2$  

•  $4abc$  

 $Find\ LCM\ of:\ a^2-9\ and\ a^2+5a+6$  

•  $\left(a+3\right)\left(a-3\right)\left(a+2\right)$  

•  $\left(a-9\right)\left(a-9\right)\left(a+5\right)\left(a+6\right)$  

 $Factorize:\ 2a^2-72$  

•  $2\left(a+6\right)\left(a-6\right)$  

•  $\left(2a+36\right)\left(2a-36\right)$