Correct Answer: Option A

Explanation

In the diagram above, x₁ = 180^o - 117^o = 63^o(opposite angles of a cyclic quad.)

x₁ = x₂ (base angles of isos. \(\Delta\))

x₁ + x₂ + \(\alpha\) = 180^o (sum of angles of a \(\Delta\)

63^o + 63^o + \(\alpha\) = 180^o

\(\alpha\) = 180^o - (63 + 63)^o

= 54^o

• If the power of a lens is +2.5D. Calculate the radius of curvature (a). 80cm (b). 40cm (c). 25cm (d).... Answer this

  1 Answers   ·   Physics   ·   4 days ago
• Subjects to learn under petroleum engineering? Answer this

  1 Answers   ·   4 days ago
• what is the cut of mark for medical doctor in university and list all the university? Answer this

  1 Answers   ·   2 days ago