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Grade 9 Math Volume One is the best textbook app.
Algebra SECTION Chapter I. TWO ROOT. THIRD ROOM §1. Square root §2. Square roots and equality constants √A2 = |A| §3. Relationship between multiplication and squared §4. Relationship between division and squared §5. Square root table §6. Simple transformation of the expression containing the square root §7. Simple transformation of the expression containing the square root (continued) §8. Simplify the expression containing the square root §9. Square Root Review Chapter I Chapter II. FIRST ORDER FUNCTION §1. Recall and supplement the concepts of the function §2. First order function §3. Graph of the function y = ax + b (a 0) §4. Parallel lines and intersecting lines §5. The slope of the straight line y = ax + b (a ≠ 0) Review chapter II GEGMENTS PART Chapter I. QUALITY SYSTEM IN A RIGHT TRIANGLE §1. Some relationships about sides and altitudes in right triangle §2. Trigonometric ratio of acute angle §3. Table of trigonometry §4. Some relations about sides and angles in right triangle §5. Practical applications of trigonometric ratios of acute angles. Outdoor Practice Review Chapter I Chapter II. CIRCUIT 1. The identification of the circle. Symmetry properties of the circle §2. Diameter and wire of the circle §3. The relationship between the wire and the distance from the center to the wire §4. Relative position of line and circle §5. Signs to identify the tangent of the circle §6. Properties of two intersecting tangents §7. Relative position of two circles §8. Relative position of two circles (continued) Review Chapter II