Question

in the diagram, ab = 10 and ac = 2√10. what is the perimeter of △abc? 20 + 2√10 units; 10 units; 10 + 2√10 units; 20 units

Explanation:

Step1: Identify coordinates of B and C

B(-5,-2), C(5,-2)

Step2: Calculate BC length

BC = √[(5 - (-5))² + (-2 - (-2))²] = √[10² + 0²] = 10

Step3: Sum all sides for perimeter

Perimeter = AB + AC + BC = 10 + 2√10 + 10 = 20 + 2√10

Answer:

20 + 2√10 units