Question

construct triangle abc in which bc=12cm angle B=90degrees AB+AC=18CM​

Answer 1

Step-by-step explanation:

BC =12 cm

AB+AC=18 cm

AC=18-AB cm

now the Pythagoras theorem

AC²= AB²+ BC²

(18-AB)²= AB²+12²

324+AB²-36AB =AB² +144

36AB= 324-144

AB= 180/36

AB= 5 cm

AC= 18-AB = 18-5 =13 cm

hence all the dimensions are getting now we can construct a triangle easily.

AB=5,BC=12,AC=13,B=90⁰

firstly we take 12 cm BC line

now at B we make 90⁰ and that line getting we cut at 5 cm then we get point A . now A and C meet and that length is 13 cm.