Answer:
80°
Step-by-step explanation:
The sum of the angles of a triangle is always 180°.
∴ 2x + 3x + 5x = 180°
10x = 180°
x = 180 / 10
x = 18
The biggest angle = 5x
= 5 * 18
= 90°
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Answer:910
Step-by-step explanation: it rounds up because if the last number is more than 5 you round up
Answer:
-4
Step-by-step explanation:
Answer: itIs c for sure
Step-by-step explanation:
Answer:
Given:
m∠C = 90°, because ∠C is a right angle.
m∠D = 90°, because CD is the height to AB.
m∠A = α
Since the sum of angles in a triangle is 180°, therefore
m∠DBC + 90° + α = 180°
m∠DBC = 90° - α
Again, for the same reason,
m∠DCB + m∠DBC + 90° = 180°
m∠DCB + 90° - α + 90° = 180°
m∠DCB = α
For the same reason,
m∠ACD + 90° + α = 180°
m∠ACD = 90° - α
m∠ADC = 90° (by definition)
m∠CDB = 90° (by definition)
Answer:
m∠DBC = 90° - α
m∠DCB = α
m∠CDB = 90°
m∠ACD = 90° - α
m∠ADC = 90°
Step-by-step explanation:
