Ответ:
25. ∠CAB = 30°; ∠B = 30°.
26. ∠1 = 140°; ∠2 = 40°; ∠К = 70°; ∠P = 20°/
27. PS = 8; SN = 16.
Объяснение:
25.
∠CAB = 120° - 90° = 30°
∠A = 2 · 30° = 60°
∠B = 90° - 60° = 30°
26.
∠1 - ∠2 = 100°
∠1 + ∠2 = 180°
---------------------складываем2∠1 = 280°
∠1 = 140°
∠2 = 180° - 140° = 40°
MQ = QP ⇒ ΔMQP - равнобедренный и
∠QMP = ∠P
∠QMP + ∠P = 180° - ∠1
2∠Р = 180° - 140°
2∠Р = 40°
∠Р = 20°
∠K = 90° - ∠P = 90° - 20° = 70°
27.
PM : PN = tg 30°
PM = PN · 1/√3
PM = 24/√3
∠Mm = 90° - 30° = 60°
∠PMS = 0.5 ∠M = 30°
PS = PM · tg ∠PMS = 24/√3 · 1/√3 = 8
SN = PN - PS = 24 - 8 = 16
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Verified answer
Ответ:
25. ∠CAB = 30°; ∠B = 30°.
26. ∠1 = 140°; ∠2 = 40°; ∠К = 70°; ∠P = 20°/
27. PS = 8; SN = 16.
Объяснение:
25.
∠CAB = 120° - 90° = 30°
∠A = 2 · 30° = 60°
∠B = 90° - 60° = 30°
26.
∠1 - ∠2 = 100°
∠1 + ∠2 = 180°
---------------------
складываем
2∠1 = 280°
∠1 = 140°
∠2 = 180° - 140° = 40°
MQ = QP ⇒ ΔMQP - равнобедренный и
∠QMP = ∠P
∠QMP + ∠P = 180° - ∠1
2∠Р = 180° - 140°
2∠Р = 40°
∠Р = 20°
∠K = 90° - ∠P = 90° - 20° = 70°
27.
PM : PN = tg 30°
PM = PN · 1/√3
PM = 24/√3
∠Mm = 90° - 30° = 60°
∠PMS = 0.5 ∠M = 30°
PS = PM · tg ∠PMS = 24/√3 · 1/√3 = 8
SN = PN - PS = 24 - 8 = 16