If sides are 7cm, 24cm, 25cm of a triangle. Area of triangle is...

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29 Mar 2013 Triangle

If sides are 7cm, 24cm, 25cm of a triangle. Area of triangle is...

OPtion

1) 75 cm^2
2) 78 cm^2
3) 84 cm^2
4) 96 cm^2
5) 100 m^2
6) 144 cm^2
7) 156 cm^2
8) 164 cm^2
9) 186 cm^2
10) None of these

Solution

In right triangle
Area = 1/2(product of perpendicular sides)
= 1/2(7*24) = 84cm^2
option 3

Correct Option: 3 Best Solution (15)

kalaiarasan   11 years AGO

area=sq(s*(s-a)*(s-b)*(s-c))
s=(a+b+c)/2 => (7+24+25)/2 => 28 cm
apply s into equation 1
area=sq(28*(28-7)*(28-24)*(28-25)) => sq(7056) =>84 cm2

Like? Yes (9) | No (1)  

Sanjeewani Indurkar   11 years AGO

7,24,25 are pythagoras triplets. Hence 25 is hypotenuse
so area of triangle=1/2 * base * height= 1/2*24*7=84
answer is option 3)84cm^2

Like? Yes (11) | No (4)  

Subesh Kumar Yadav   11 years AGO

a=7;b=24;c=25;
a^2+b^2=c^2;
so this is the right-angle triangle
so area=1/2*7*24=84cm^2

Like? Yes (4) | No (2)  

krishnapriya   11 years AGO

Area of a triangle=sqrt(p(p-a)(p-b)(p-c)) where p=(a+b+c)/2
Given a=7,b=24,c=25
therefore, p=(7+24+25)/2=28
Area, A=sqrt(28(28-7)(28-24)(28-25))=sqrt(7056)=84

Like? Yes (3) | No (2)  

ravindra   11 years AGO

area of triangle=1/2*base*height
12/*7*24=84cm^2

Like? Yes (2) | No (1)  

Ravi Kandala   11 years AGO

1/2base*height=1/2*7*4=84

Like? Yes (1) | No   

vipul pratap singh   11 years AGO

this triangle have base 24 and height 7 so

area= 1/2(24*7)=84 cm^2;

Like? Yes (1) | No   

Kalpesh   11 years AGO

Area of triangle = 1/2 * b * h
= 1/2 *7 * 24
= 7 * 12
= 84

Like? Yes (1) | No   

anjul meid   11 years AGO

area=sqrt(p(p-7)(p-24)(p-25));where p=(7+24+25)/2=28

Like? Yes (1) | No   

jatin patware   11 years AGO

it is right angle triangle
area. base*height/2
7*24/2
84

Like? Yes (1) | No   

niru   11 years AGO

it will find by Heron's formula
A=root of(p(p-a)(p-b)(p-c))

where p=(a+b+c)/2

Like? Yes (1) | No   

NEERAJ CHOUDHARY   11 years AGO

since s=(a+b+c)/2

area = (s(s-a)(s-b)(s-c))^(1/2)
hero's formula

Like? Yes (1) | No   

Rats   11 years AGO

It's a right angled triangle
So area=1/2*b*h
=1/2*7*24
=7*12=84cm^2

Like? Yes (1) | No (1)  

jatin   11 years AGO

these are the sides of equilateral traingle
so area=1/2*base*height
=1/2*7*24=84

Like? Yes (1) | No (1)  

D.Jagruthi   11 years AGO

area of the traingle is with regarding to sides are
sq rt(s(s-a)(s-b)(s-c))
where s=((a+b+c)/2) and a,b,c are the sides of the triangle
therefore,s=((7+24+25)/2)=28
and now area =sq rt(s(s-a)(s-b)(s-c))
=sq rt(28(28-7)(28-24)(28-25))
=84 cm^2

Like? Yes (1) | No (1)