Answer:
Step-by-step explanation:
The formula for the area of triangle is
A = ½bh
In your triangle, b = QR and h = PT.
We can use Pythagoras' Theorem to find the lengths of these line segments.
1. Length of QR
Draw a point U at (-2, -5) and connect line segments QU and RU.
QU = 6 - (-2) = 6 + 2 = 8
RU = -1 - (-5) = -1 + 5 = 4
2. Length of PT
Draw a point S at (4, -3) and connect line segments PS and ST.
PS = 2 - (-2.8) = 2 + 2.8 = 4.8
ST = 4 - 1.6 = 2.4
3. Area of triangle