Question

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Answer 1

Answer:

perimeter is 18

and BC is 8

Step-by-step explanation:

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Answer 2

Answer:

3) perimeter of triangle ABC is 18 units

4) BC = 8 cm

Step-by-step explanation:

3) sides of triangle = 5 , 6 and 7 unit

perimeter = 5+6+7

perimeter of triangle ABC = 18 units

4) triangle ABC is an isosceles triangle (given)

therefore AB = AC

AB = 10 cm (given)

so , AC = 10 cm as (AB = AC Perimeter of triangle = sum of all sides of triangle

28 cm = AB + AC + BC

28 = 10+10+BC

28 = 20+BC

BC = 28-20

BC = 8 cm