Find the area of the following triangles :
A
(1)
12 cm
B
D
13 cm
Answers
Answered by
1
Answer:
5² + 12² = 13²
=> 5 & 12 or 12 & 5 is the base and altitude of the triangle respectively.
=> Area = ½ x base x altitude
= ½ x 5 x 12 = 30 cm²
Use Heron’s Formula
A = √{s(s - a)(s - b)(s - c)} where s = (a+b+c)/2
=> s = (5+12+13)/2 = 15
Area = √(15x 10 x 3 x 2) = √900 = 30 cm²
Use sin formula
Area = ½ x a x b x sin (theta)
=> ½ x 5 x 12 x Sin 90°
= 30 x Sin 90° = 30 x 1 = 30 cm²
Step-by-step explanation:
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Answered by
1
Answer:
12x12= 144
13x13=169
Step-by-step explanation:
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