, 2 4. , 2. : , 5, 1996, .75 | |
. SABCD , ABCD , AB = CD, = 2, AD = 4, SO = 2 . S | |
: 1. 2. = = r 3. D = ++D+D, , +CD=AD+BC=4+2=6, =CD=3 D=62=12. 4. . , SM Δ SMO, SO = 2, = r. 5. S = pr 6. ABCD (. ), . 7. Δ , = 3, = ED = (4 2): 2 = 1, 2 = 2 2 = 9 1 = 8, = 8. . 9. 10. Δ SMO , = , SO = 2, SM2 = 2 + SO2 = 2 + 4 = 6, SM= 12. SM , . 6 | , 1. ( SKO = SMO = ), , : 2. , , , 3. ABCD , , 5. S = pr , , - , r - . 6. - , a b , h . 7. 2 = 2 + b2, 2 = 2 - b2 |
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