Question

Can someone help me please...

Answer 1

Answer: 50

Explanation:

Answer 2

Explanation:

Multiply all lengths by 150÷100=1.5

New value of AB = 1.5 × 20cm=30cm

New value of AC = 1.5 ×21cm= 31.5cm

New value of BC = 1.5 ×9cm= 13.5cm

New perimeter of ∆A'B'C= 13.5cm +31.5cm +30cm= 75cm.