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Answer:
Median: b
Altitude: c
Angle bisector: a
Perpendicular bisector: d
Step-by-step explanation:
80°
angles in a triangle add up to 180°
70° + 30° = 100°
180° - 100° = 80°
the 2nd one
2*3x is 6x
2*4 is 8
equation is 6x+8
4
The diagonals are equal length:
