Question

if angle abc is 12 cm and angle adc is 12 cm and dcb is also 12 cm what is forms and what is angle bad is?​

Answer 1

Answer:

pL try to this tip

Step-by-step explanation:

It is given that in △ABC, the altitude AD=12 cm. Also BD=8 cm and DC=18 cm.

AD is the altitude ⇒AD⊥BC.

⇒△ABD and △ADC are both right angled triangles.

⇒AB2=AD2+BD2=144+64=208, and,

AC2=AD2+DC2=144+324=468.

⇒AB2+AC2=208+468=676.

But, BC2=(BD+DC)2=(8+18)2=676.

⇒AB2+AC2=BC2.

⇒△BAC is right angled (by the converse of Pythagoras Theorem).