Ответ:
7) 30
9) 1225
Объяснение:
7) AD+BC = 25+10 = 40
AB = 40-DC = 40-10 = 30
9) 180° − 90° − 45° = 45°
70 * sin 45° = 70 * = 35
S = 1/2 * 35 * 35 = 1225
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Answers & Comments
Ответ:
7) 30
9) 1225
Объяснение:
7) AD+BC = 25+10 = 40
AB = 40-DC = 40-10 = 30
9) 180° − 90° − 45° = 45°
70 * sin 45° = 70 *
= 35
S = 1/2 * 35
* 35
= 1225