Question

Find the area of the park whose vertices are P(3, 0), Q(8, 0) and R(8, 4).

Answer 1

Answer:

Hope it helps

Step-by-step explanation:

Consider a = 3 cm, b = 4 cm and c = 5 cm

We know that

S = Semi perimeter = (a + b + c)/ 2

Substituting the values

= (3 + 4 + 5)/ 2

= 12/2

= 6 cm

= 6 cm2

(ii) Consider a = 29 cm, b = 20 cm and c = 21 cm

We know that

S = Semi perimeter = (a + b + c)/ 2

Substituting the values

= (29 + 20 + 21)/ 2

= 70/2

=35 cm

So we get

= 7 × 5 × 3 × 2

= 210 cm2

(iii) Consider a = 12 cm, b = 9.6 cm and c = 7.2 cm

We know that

S = Semi perimeter = (a + b + c)/ 2

Substituting the values

= (12 + 9.6 + 7.2)/ 2

= 28.8/2

= 14.4 cm

So we get

= 2.4 × 2.4 × 6

= 34.56 cm2

Answer 2

Answer:

6cm2

Step-by-step explanation:

Substituting the values

= (3 + 4 + 5)/ 2

= 12/2

= 6 cm