Question

1 ) In A ABC, AB = 5 cm. BC = 12 cm and AC = 15 cm. Then. A ABC is an obtus angled triangle
true or false ?​

Answer 1

Answer:

true this is true

Step-by-step explanation:

please mark as brainlist please

Answer 2

Answer:

In A ABC, AB = 5 cm. BC = 12 cm and AC = 15 cm. Then. Triangle ABC is an obtuse angled triangle - False statement

Step-by-step explanation:

In ABC is a triangle with sides a,b,c.

if c^2 < a^2 +b^2

 then C is a acute angle.

∴△ABC is a acute angled triangle.

Since, a = 5cm,b=12cm,c=15cm

15^2 <5^2 + 12^2 ,

225 < 25 + 144

225 < 169

So,  △ABC is not obtuse angled triangle.