Tolong dibantu ya, saya kurang paham, oke

By Admin ReiPosted on December 6, 2022

Tolong dibantu ya, saya kurang paham, oke

Tolong dibantu ya, saya kurang paham, oke

Diketahui:

∠CAB = 30°
∠ACB = 85°
∠ABD = 180°
∠CAB + ∠ACB + ∠CBA = 180°

$\text{[math]}$

Pertama cari ∠CBA

∠CAB + ∠ACB + ∠CBA = 180°

∠CBA = 180° – (∠CAB + ∠ACB)

∠CBA = 180° – (30° + 85°)

∠CBA = 180° – 115°

∠CBA = 65°

$\text{[math]}$

Kedua cari ∠CBD

∠CBA + ∠CBD = ∠ABD

∠CBD = ∠ABD – ∠CBA

∠CBD = 180° – 65°

∠CBD = 115°

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