Answer:
11) 2
12) 1
13) 6
14) 6
15) m<1=58°
m<2=122°
m<3=58°
m<5=122°
m<6=58°
m<7=122°
m<8=58°
Step-by-step explanation:
11) 2
12) 1
13) 6
14) 6
15) m<1=58°
m<2=122°
m<3=58°
m<5=122°
m<6=58°
m<7=122°
m<8=58°

factor out common term 3 :

hope this helps!
Answer:
8.15 is the answer
Step-by-step explanation:
Answer:
The value of AD=1 and DC=3
Step-by-step explanation:
Given: ΔABC, D∈ AC m∠ABC=m∠BDA, AB=2, AC=4
Diagram: Please find attachment.
To find: AD=? and DC=?
Calculation:
In ΔABC and ΔADB
∠ABC=∠ADB (Given)
∠A=∠A (Common)
Therefore, ΔABC ≈ ΔADB by AA similarity
If two triangles are similar then ratio their corresponding sides are equal
Therefore,

where, AD=?, AB=2, AC=4


AD=1
AD+DC=AC
1+DC=4
DC=4-1
DC=3
Hence, The value of AD=1 and DC=3