3. 12. Given: BDI BC; ZABD = ZDBE
Prove: ZABD and ZEBC are complementary
B
Reasons
Statements
1.
1. BDI BC
2. DBC is a right angle
2.
3. MZDBC = 90°
3.
4. MZDBE + MZEBC = MZDBC
4.
5. MZDBE + MZEBC = 90°
5.
6. ZABD X ZDBE
6.
7. MZABD = MZDBE
7.
8. MZABD + MZEBC = 90°
8.
9. ZABD and ZEBC are complementary 9.

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What is the standard form of -5x^2+2x^4-11+x^3+3x

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