Dörtgende Açı Hesaplama

4.

ABCD dörtgen; K, A, B ve L doğrusal noktalardır.

$m(\widehat{ADC}) = 70^\circ$, $m(\widehat{DCB}) = 50^\circ$,

$m(\widehat{KAD}) = \alpha$ ve $m(\widehat{LBC}) = \beta$

Yukarıdaki verilere göre $\alpha + \beta$ toplamı kaç derecedir?

Soruda görsel içerik var: A quadrilateral ABCD is shown with a line segment passing through vertices A and B, which also contains points K and L such that K-A-B-L is a line. The exterior angle at vertex A (angle KAD) is denoted by alpha, and the exterior angle at vertex B (angle LBC) is denoted by beta. The internal angle at vertex D is 70 degrees, and the internal angle at vertex C is 50 degrees.