Uhhh
Could you finish the question?
Answer:
Step-by-step explanation:
487 is a prime, because 487 is only divided by 1 or by itself
The answer is 40°
i will tell you how,
Total angle sum of any triangle is 180°
∠A + ∠B + ∠E = 180°
70° + 80° + ∠E = 180°
solve for ∠E
∠E = 30°
Now solve use ∠BDE,
∠B + ∠D + ∠E = 180°
20° + 90° + 30° + x = 180° (in triangle DEB, ∠E = 30 + x ) (∠D is 90°)
solve for x
there fore, x = 40°
77/8= 9.625 and 31/4= 7.75...so 9.625-7.75= 1.875