среда, 29 марта 2017 г.

Test 3. Isosceles and equilateral trianqles

 1. Find the angles marked with letters (Exam Question often want reasons. Ask your teacher if you must write down all the reasons)
 аt  110;      bt  125;     
 c)  t  120;      dt  115.

 2. Find the angles marked with letters (Exam Question often want reasons. Ask your teacher if you must write down all the reasons)
 аx  38y  72z  72;     
 b)  x  36y  72z  72;     
 cx  36y  74z  74;     
 dx  35y  75z  75.

 3. Find the angles marked with letters.
 аo  75;      bo  70;
 co  72;      d)  o  74.

 4. Find the angles marked with letters.
 а)  r  25q  130,  p  50;     
 br  20q  130p  50;     
 cr  25q  135p  50;     
 dr  25q  130p  40.

 5. Find the angles marked with letters.
 аr  74s  28v  28;     
 br  76s  26v  26;     
 c)  r  76s  28v  28;     
 dr  75s  25v  25.

 6. Find the angles marked with letters.
 аa  60b  60;     
 ba  90b  90;     
 ca  85b  85;     
 d)  a  80b  80.

 7. Find the angles marked with letters.
 аc  62d  52⁰,  e  52;     
 b)  c  64d  52⁰,  e  52;     
 cc  64d  54⁰,  e  54;     
 dc  60d  50⁰,  e  50.

 8. Find the angles marked with letters.
 а)  f  60g  120;     
 bf  50g  130;     
 cf  80g  100;     
 df  70g  110.

 9. Find the angles marked with letters.
 аg  65r  115;     
 bg  55r  125;     
 c)  g  60r  120;     
 dg  80r  120.

10. Find the angles marked with letters.
 аm  74, l  74;     
 b)  m  72, l  72;     
 cm  70, l  70;     
 dm  75, l  75.

11. Find the angles marked with letters.
 а)  k  72j  54i  54;     
 bk  74j  54i  54;     
 ck  72j  52i  52;     
 dk  70j  50i  50.

12. Find the angles marked with letters.
 аf  145e  35;     
 bf  142e  36;     
 cf  144e  38;      
 d)  f  142e  38.                 

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