Building Construction
A pointed arch which forms isosceles or equilateral triangle, is generally known as

Two centered arch
Bull's eye arch
Three centered arch
Lancet arch

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Building Construction
Single Flemish bond consists of

English bond facing and double Flemish bond backing in each course
Double Flemish bond facing and header bond backing in each course
Stretcher bond facing and double Flemish bond backing in each course
Double Flemish bond facing and English bond backing in each course

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