Answer:
∠C = 106.7°, ∠D = 73.3°, CD = 104.4
Step-by-step explanation:
As shown in the diagram attached, let a point E be made on line BD.
Hence, BE = 130 m
BE + ED = BD
ED = BD - BE
ED = 160 m - 130 m = 30 m
Also, CE = 100 m
Using Pythagoras theorem in triangle CDE:
CD² = CE² + ED²
CD² = 100² + 30²
CD² = 10000 + 900 = 10900
CD = √10900
CD = 104.4
Using sine rule in triangle CDE:
In trapezoid ABCD, the sum of angles in a quadralateral is 360°, hence:
∠A + ∠B + ∠C + ∠D = 360
90 + 90 + ∠C + 73.3 = 360
∠C + 253.3 = 360
∠C = 360 - 253.3
∠C = 106.7
Answer:
the last choice
Step-by-step explanation:
consists of a sloping surface connecting a lower elevation to a higher elevation
Answer:
i dont know sorry
Step-by-step explanation:
Answer:
um 2x dos
Step-by-step explanation:
Answer: She worked as a carpenter for 12 hours and a blacksmith for 18 hours.
Step-by-step explanation:
18*25 = 450
12*20 = 240
240 + 450 = 690
12 + 18 = 30.