We know that the area of triangle
= 1/2 x base x height
In first row,
base = 15 cm and area = 87 cm2
87 =1/2 x 15 x height
⇒ height =(87 x 2)/15
= 11.6 cm
In second row, height = 31.4 mm and area = 1256 mm2
\ 1256 = 1/2 x base x 31.4
⇒ base = (1256 x 2)/31.4
=80 mm
In third row,
base = 22 cm and area = 170.5 cm2
170.5 = 1/2 x 22 x height
⇒ height = (170.5 x 2) /22
=15.5 cm
Thus, the missing values are:
Base |
Height |
Area of triangle |
15 cm |
11.6cm |
87 cm2 |
80 mm |
31.4 mm |
1256 mm2 |
22 cm |
15.5cm |
170.5 cm2 |