Congruent Triangles std8 Page-18.3 EM
📐 Two Triangles | Find All Angles
Given ∠B in ΔABC and ∠R in ΔPQR | Use angle sum property
△ ABC
∠B = ?° (given)
∠A = ?°
∠C = ?°
△ PQR
∠R = ?° (given)
∠P = ?°
∠Q = ?°
🔍 Use Triangle Angle Sum Property: ∠A + ∠B + ∠C = 180°
📐 Similarly, ∠P + ∠Q + ∠R = 180°
📍 Triangles are independent (no congruence given)
✍️ Find all angles of both triangles
1 Find ∠A
In ΔABC, ∠B = ?°. If ∠C = ?°, what is ∠A?
2 Find ∠C
In ΔABC, ∠B = ?°. If ∠A = ?°, what is ∠C?
3 Find ∠P
In ΔPQR, ∠R = ?°. If ∠Q = ?°, what is ∠P?
4 Find ∠Q
In ΔPQR, ∠R = ?°. If ∠P = ?°, what is ∠Q?
5 Value of ∠A
∠A = ? degrees
6 Value of ∠C
∠C = ? degrees
7 Value of ∠P
∠P = ? degrees
8 Value of ∠Q
∠Q = ? degrees