Question

Utsien plane,
9. If|() = x + 3x - 21 - 1, then find whether O) X (-1) = 12).
1. In the giren figure AD BC and BD = 10. Prove that, ADB = BCA​

Answer 1

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In triangle ADB and triangle BCA 

AD=BC (GIVEN) 

DB=CA (GIVEN) 

angleDAB=angleABC (ANGLES OPPOSITE TO EQUAL SIDES ARE ALSO EQUAL) 

SO,TRIANGLE ADB CONGRUENT TO TRIANGLE BCA (SAS) 

SO,angle ADB=angleBCA (CPCT)

ALSO, angle DAB =angleCBA (CPCT)