Question

PERIMETER
Find the missing values:
Base
Height
Area of Triangle
15 cm
87 cm
31.4 mm
1256 mm
22 cm
170.5 cm​

Answer 1

Step-by-step explanation:

(1)

Base b=15cm For triangle,

h=? Area =

2

1

×base×heightA

A=87cm

2

A=

2

1

b×h=87cm

2

2

1

×15×h=87

h=

5

58

cm=11.6 cm,h=11.6 cm

(2) b=?

h=31.4 mm

A=1256 mm

2

=

2

1

×b×h

1256=

2

1

×b×31.4

∴b=80 mm

(3) b=22 cm

h=?

A=1705cm

2

=

2

1

×22×h

∴h=15.5cm