Calculate the area of a triangle, if the sides are 30 cm, 21 cm and 10 cm, what is its area?	Choose the correct option.
A) 145 cm2 B) 105 cm2 C) 125 cm2 D) 115 cm2 E) 135 cm2
The triangle with sides 30 cm, 21 cm and 10 cm is right angled, where the hypotenuse is 30 cm.   Area of the triangle = 1/2 * 21 * 10= 
<gadget id="calculator">1/2 * 21 * 10</gadget>
<output>105</output>
105 cm2   Answer: 105 cm2
<result>B</result>
Calculate the area of a triangle, if the sides are 30 cm, 21 cm and 10 cm, what is its area?