Question

3)
angle ECF-70 degree m(are DGF) = 200º find m (are DE) & m (are DEF)​

Answer 1

Answer:

triangle

Step-by-step explanation:

it is by 45 degree by solving...

Answer 2

Answer:

m(arc EF)= /_ECF...... (defination of measure of

measure of minor arc)

/_ECF=70°

m(arc DGF)+m(arc EF)+m(arc DE)=360°......

(measure of a cricle is

360°)

200°+70°+m(arc DE)=360°

270°+m(arc DE)=360°

m(arc DE)=360°-270°

m(arc DE)=90°

m(arc DE)+ m(arc EF)°=m(arc DEF)...(Arc

addition postulate)

90°+70°=m(arc DEF)

m(arc DEF)=160°

m(arc DE)=90° and m(arc DEF)=160°