Advertisements
Advertisements
प्रश्न
If in triangles ABC and EDF, `"AB"/"DE" = "BC"/"FD"` then they will be similar, when
विकल्प
∠B = ∠E
∠A = ∠D
∠B = ∠D
∠A = ∠F
उत्तर
∠B = ∠D
Explanation;
Hint:
`"AB"/"ED" = "BC"/"DF" = "AC"/"EF"`
∴ ∠B = ∠D
APPEARS IN
संबंधित प्रश्न
In triangle ABC, AD is perpendicular to side BC and AD2 = BD × DC. Show that angle BAC = 90°.
In ΔPQR, PQ = 10 cm, QR = 12cm, PR = 8 cm, find the biggest and the smallest angle of the triangle.
Δ ABC - Δ XYZ. If area of Δ ABC is 9cm2 and area of Δ XYZ is 16cm2 and if BC= 2.1cm, find the length of YZ.
The length of a river in a map is 54cm. if lcm on the map represents 12500m on land, find the length of the river.
Construct a ΔABC in which CA = 6 cm, AB = 5 cm and ∠BAC = 45°. Then construct a triangle whose sides are `3/5` of the corresponding sides of ΔABC.
In the given figure, AB and DE are perpendicular to BC.
- Prove that ΔABC ∼ ΔDEC
- If AB = 6 cm, DE = 4 cm and AC = 15 cm. Calculate CD.
- Find the ratio of the area of a ΔABC : area of ΔDEC.
ΔABC is enlarged, with a scale factor 5. Find: A'B', if AB = 4cm
In a triangle ABC, AB = 4 cm, BC = 4.5 cm and CA = 5 cm. Construct ΔABC. Find the image A'B'C of the ΔABC obtained by enlarging it by a scale factor 2. Measure the sides of the image A'B'C' and show that AB:A'B' = AC:B'C' = CA:C'A'
ΔABC ~ ΔPQR, A(ΔABC) = 80 sq.cm, A(ΔPQR) = 125 sq.cm, then complete `("A"(Δ"ABC"))/("A"(Δ"PQR")) = 80/125 = (["______"])/(["______"])`, hence `"AB"/"PQ" = (["______"])/(["______"])`
If ΔABC ∼ ΔDEF and ∠A = 48°, then ∠D = ______.
