<DBF = 70°, <ABF = 160°.
Объяснение:
<ABD = 90°, <CBF = 90° (дано)
<DBC = <ABD - <ABC = 90 - 70 = 30°.
<DBF = <CBF - <DBC = 90° - 30° = 70°.
<ABF = <FBC + <ABC = 90 + 70 = 160°.
<DBF = 70°, <ABF = 160°.
Объяснение:
<ABD = 90°, <CBF = 90° (дано)
<DBC = <ABD - <ABC = 90 - 70 = 30°.
<DBF = <CBF - <DBC = 90° - 30° = 70°.
<ABF = <FBC + <ABC = 90 + 70 = 160°.