Final answer:
In a quadrilateral ABCD, two pairs of opposite sides are AB and CD, and BC and AD. Two pairs of opposite angles are ∠A and ∠C, and ∠B and ∠D. Two pairs of adjacent angles are ∠A and ∠B, and ∠C and ∠D. The two diagonals in a quadrilateral are AC and BD.
Step-by-step explanation:
In a quadrilateral ABCD, the sides, angles, and diagonals can be identified as follows:
a) Two pairs of opposite sides:
- Side AB is opposite to side CD.
- Side BC is opposite to side AD.
b) Two pairs of opposite angles:**
- Angle A is opposite to angle C.
- Angle B is opposite to angle D.
c) Two pairs of adjacent angles:
- Angle A is adjacent to angles B and D.
- Angle B is adjacent to angles A and C.
- Angle C is adjacent to angles B and D.
- Angle D is adjacent to angles A and C.
d) Two diagonals:
- Diagonal AC connects vertex A to vertex C.
- Diagonal BD connects vertex B to vertex D.